GB/T 15146.6-1994 Borosilicate glass Raschig rings for criticality safety of fissile materials outside reactors and their application criteria
Some standard content:
National Standard of the People's Republic of China
Nuclear criticality safety for fissile materlals outslde reactorBorosllicate glass Raschig rlngs and its application criteria1Subject content and applicable scope
CB/T15146.6—94
This standard specifies the chemical environment, physical environment, technical requirements for the rings and the ring containers, maintenance inspection procedures and subcritical limits for the use of borosilicate glass Raschig rings as neutron absorbers in fissile material solutions. This standard applies to the use of borosilicate glass Raschig ring neutron absorbers as critical control sections in containers containing sinter-235 and annulus-239 solutions.
2 Reference standards
GB5432 Density determination method for daily glass
GB6582 Particle test method and classification of glass at 98°C water resistance ZBQ30001 Chemical analysis method for borosilicate glass 3 Terminology
3.1 Raschig ring (ring)
A hollow small round tube of borosilicate glass with substantially equal length and diameter. 3.2 Inspection Raschig ring (inspection ring)
A Raschig ring used for non-destructive inspection of its physical properties and kept in the solution for a long time (except for short-term testing). 3.3 Main criticality control means
Control means that are mainly or solely relied upon to maintain the subcritical state of a system containing fissile materials. 3.4 Auxiliary criticality control means
A control means that is used as a supplement to the main criticality control means and as a backup when the failure of the main criticality control means (occurrence rate is not high).
4 General technical provisions
Borosilicate glass must have a low expansion rate (a≤3.3×10-/℃) and corrosion resistance. This glass must be compatible with the chemical and physical environment in which it will be placed.
4.1 Chemical environment
4.1.1 Acidic or neutral environment. The acidic or neutral solution in which Raschig rings are to be used as the main criticality control means or auxiliary criticality control means must meet the following restrictions: a. pH value is not less than 7. 0,
b. Temperature not higher than 120℃
National Technical Supervision Commission approved on July 7, 1994 and implemented on January 1, 1995
GB/T15146.6-94
c. The concentration of hydrofluoric acid shall not exceed 0.0001mol/L, unless the compatibility has been confirmed in accordance with 5.2.3 and 7.5.3; Note: For some complexes composed of hydrochloric acid and other mols, a higher concentration of hydrofluoric acid is also allowed. d. The ion concentration of phosphate is not greater than 1 mol/L. Subject to these restrictions, acceptable chemical environments may include solutions of organic or inorganic acid salts, hydrocarbons, and solutions of complexing agents or integrators in hydrocarbons. 4.1.2 Alkaline environments. Raschig rings shall not be used as primary critical control measures in alkaline solution environments. The alkaline solution in which the pull ring will be located must meet one of the following restrictions: a. The silt concentration of sodium, potassium or ammonium hydroxide is not greater than 0.5 mol/L when the temperature is below 38°C, or b. The pH value is less than 9 when the temperature is below 120°C. 4.2 Physical environment
4.2.1 Mechanical environment. For applications where Raschig rings are subject to agitation, or may be accidentally agitated (e.g., dichlorvos may agitate these rings), heat-tempered rings must be used. Typical applications where agitation may occur include evaporators, movable containers, pulse Column and container with air or steam injection equipment, etc.
4.2.2 Radiation environment. Borosilicate glass Raschig rings shall not be used in strong ionizing radiation fields. The maximum radiation dose rate allowed for Raschig rings is as follows:
——10°Gy/ar
P————Rays with energy not greater than 0.05MeV, 107Gy/aβ—β rays with energy greater than 0.05MeV, 10°Gy/a neutrons——5×10°Gy/al
——and solution absorption. The heat generation rate after the energy of the particles is 2W/I. The equivalent radiation dose rate. 5 Technical requirements for Raschig rings
Borosilicate glass Raschig rings must meet the following technical requirements: 5.1 Composition
5.1.1 Glass density
At 25C, the glass density shall not be less than 2.22g/cm. The density measurement must be carried out in accordance with the provisions of GB5432. 5.1.2 Compounding
The content of boron in the glass must be between 3.66 and 4.28 wt% B (11.8 and 13.8 wt% B; 0,). The determination of boron content must be carried out in accordance with the relevant provisions of ZBQ30 001.
5.1. 31'B content
The atomic ratio of \B to \B in the boron glass shall not be less than 0.240. 5.2 Chemical approval tests
5.2. 1 Water resistance test
The water resistance of Raschig rings must be determined in accordance with the provisions of GB6582. The water resistance must reach level 1. 5.2.2 Nitric acid test
If Raschig rings are to be used in acidic solutions other than hydrochloric acid or phosphoric acid, the following test must be carried out. First, 10 clean and dry Raschig ring samples randomly selected are weighed, and the weighing accuracy must reach 0.001 μm. The rings are then placed in a stainless steel container with a volume of 2 L and equipped with a reflux condenser. 1 L of 7.0 mol/L nitric acid is added to the above container containing the Raschig rings and kept at 95°C for 48 h. The rings are then rinsed with distilled water, dried at 105°C for 1 h, and weighed again with an accuracy of 0.001. The weight loss of the 10 sample rings shall not exceed 0.010%. 5.2.3 Sodium hydroxide test
If Raschig rings are to be used as an auxiliary critical control means in alkaline liquid, the following test must be carried out. First, 10 randomly selected clean and dry Raschig ring samples are weighed with an accuracy of 0.001 g. The rings are then placed in a stainless steel container with a volume of 2 L and equipped with a reflux condenser. Add 1L of 1.0mol/L sodium hydroxide to the above container containing the Raschig rings and keep it at 95°C for 6h. Then rinse the rings with distilled water, dry them at 105°C for 1h, and weigh them again, and the weighing accuracy is still 0.001g. The weight loss of 1D sample rings shall not exceed 0.20%. 5.2.4 Hydrofluoric acid test
If Raschig rings are to be used in an acidic or neutral environment containing a hydrofluoric acid concentration greater than 0.0001mol/L, chemical qualification tests corresponding to the expected process conditions must be carried out. In addition, inspections and tests must be carried out frequently to confirm that the Raschig rings can still maintain their relative integrity in such a highly corrosive environment,
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5.3 Ring size
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The outer diameter of the Raschig ring shall not be greater than 3.8cm. For rings with dimensions exceeding this value but otherwise complying with this standard, their acceptability must be demonstrated by a special criticality evaluation. However, a slight increase in diameter caused by flame polishing at both ends of the ring is acceptable. 5.4 Ring appearance
All outer surfaces of the processed Raschig ring must be smooth and free of sharp edges. 5.5 Mechanical vibration test
Raschig rings which are subject to agitation during use or which may be accidentally agitated (e.g., a floor exhibition may disturb the rings) must, in addition to being tempered, also pass a mechanical vibration test. This test must be carried out in a horizontally placed ribbed circular drum as described in the figure. First, 10 clean and dry Raschig rings selected at random are placed in this dry drum, which is then rotated about its axis at a constant speed of about 10 r/min. After 5 revolutions (about 30), stop and inspect the Raschig rings in the drum. Pick up all broken glass and count the rings that are still intact. Then let the drum rotate 5 more times at the same speed. After this test, the number of Raschig rings that are still intact must be greater than 70% to be considered satisfactory. Rings that can retain more than 90% of their original weight are considered to be still intact. If necessary, the above test must be repeated with additional samples to determine whether the test samples are statistically representative. 6 Technical requirements for containers with rings
Containers for Raschig rings must be equipped with suitable openings and accessories to facilitate the addition and removal of solutions and rings, the extraction of representative samples of solutions and rings, the measurement of solution volume and ring filling height, and the cleaning of containers and rings. The solution discharge pipe must be designed and installed to prevent the intact rings from flowing out with the solution (such as installing a net at the solution outlet to prevent the rings from flowing out). 6.1 Pipes without rings in containers
GB/T15146.6—94
Containers for Raschig rings may be equipped with pipes filled with solution but without rings and with an outer diameter of less than 6.4 cm (or a pipe bundle with an effective outer diameter of less than 6.4 cm), provided that the edge-to-edge distance between adjacent pipes is not less than 30.5 cm. These pipes can be used to detect liquid levels, extract solutions, and extract solutions and ring samples. For example, a group of inspection Raschig rings can be placed in a multi-hole pipe (facilitating the communication of solutions inside and outside the pipe) arranged vertically through the top of the container. Provision shall be made for the insertion and removal of all samples of Raschig rings to be inspected during the intended life of the rings to ensure that the rings removed for inspection have not been displaced from a previous inspection. 6.2 Determination of Raschig ring filling height
If the filling height of the rings is to be checked visually, a sufficient number of inspection holes or sight glasses shall be provided to allow the general compaction and regularity of the surface to be observed by observing the upper surface of the Raschig rings. The filling height may be checked remotely by radiography or by measuring the free space in the container as a function of the liquid level. The method for restoring the filling volume after the sinking of the Raschig ring is detected is given in 7.1. 6.3 Volume of solution allowed in a container containing Raschig rings Provision shall be made to prevent the presence of solution in the ring-free zone formed after the rings have sunk. It is expected that the rings may sink by up to 5% of the original filling volume. Overflow pipes can be used for protection. The size and installation height of the overflow pipes should be sufficient to limit the liquid level in the container to a position corresponding to 95% of the capacity of the container after the initial filling of the Raschig rings. If this method is not applicable to the container in question, a liquid level indicator can be installed on the container, supplemented by an appropriate alarm system and strict operating procedures to ensure that the amount of solution in the container does not exceed 80% of the capacity of the container after the Raschig rings are filled.
Note: 1) The bulk density of the Raschig ring will increase due to sinking, and it is currently estimated that the capacity of the container with an overflow pipe can be reduced by more than 5%. 6.4 Container Leakage
For devices that use Raschig rings as the main criticality control means, measures must be taken to prevent the fissile liquid leaking from the device from reaching criticality.
6.5 Volume fraction
The capacity of the container without rings must be measured or calculated, and the volume of liquid required to fill the container with rings must be measured. The volume fraction of the container occupied by the Raschig rings (the glass volume fraction) must then be determined from these two values. The maximum concentration of the solution specified in Chapter 8 "Subcritical concentration limits for fissile solutions" must be based on the glass volume fraction thus determined. 6.6 Packing of Raschig rings
The Raschig rings must be packed in such a way that the randomly oriented rings can flow freely. It must be ensured that the corners and other inaccessible places of the container are also filled with rings and that they are flowable. A more satisfactory method of filling is to first fill the container partially with water or other relevant liquid and then pour the Raschig rings in batches (e.g. 250 to 1000 rings per batch). When using a container that has previously contained fissile material, this operation should be carried out with particular care and it must be verified that there is no fissile material in the container. The advantage of this method is that it can greatly reduce the damage of the rings and help the sinking and uniform distribution of the rings. The rings must be compacted by a method that has been proven to be satisfactory, such as target, stirring or bubbling agitation. 7 Maintenance and Inspection
The Raschig rings in the piercer must be checked regularly to determine whether the rings have sunk, whether solids have accumulated, and whether the physical and chemical properties of the rings have changed. A Ring Container Inspection Form must be completed for each container filled with rings. The form format is shown in Appendix A (reference). 7.1 Sinking Inspection
The position of the upper surface of the Raschig ring in the container must be determined by visual inspection or remote inspection. If sinking is found and the sinking rate indicates that the top 5% of the space in the container may be free of rings before the next inspection, some rings must be added to restore it to the specified filling height. When the required amount of gain is about to reach 110% of the original load, all the rings already in the container must be replaced. The volume or number of rings added and other relevant conditions must be recorded in the Ring Container Inspection Form. 7.2 Accumulation of solids
The ring surface must be tested for any significant accumulation of solids by the following test. Particular attention should be paid to the accumulation of fissile solids. 7.2.1 Balance of fissile materials
This is a requirement for the use of Raschig rings as a primary criticality control device for uranium solutions with an isotopic enrichment of uranium-235 greater than 5.0 wt% and for solutions. There is no such requirement for mixtures of Raschig rings and uranium solutions with an isotopic enrichment of uranium-235 equal to or less than 5.0 wt% because such mixtures are unlikely to be brought to criticality by the accumulation of solids. During inspections, the volume of liquid falling from the filled ring container must be determined. A representative sample of the liquid must be analyzed for fissile material content. The inflow and outflow of fissile material from each filled ring container must be calculated periodically, the frequency of which depends on the type of operation. Generally, monthly. - is appropriate unless experience shows that a longer period is justified. However, in some cases, the fissile material balance must be made more frequently. The frequency should be selected with a safety margin to ensure nuclear criticality safety. If the loss of fissile material exceeds 1000 t (or a greater value determined by the appropriate criticality safety analysis), the container and Rasch rings must be cleaned to the extent that this number is eliminated.
7.2.2 Determination of fissile solids on the rings
A number of Rasch rings shall be taken from a representative area of the container and the amount of fissile material in the solids deposited on the surface of the rings shall be determined. If the total amount of shafts or rings in the surface solids deposited per liter of glass exceeds 50 g, the rings in the container shall be cleaned. If the uranium-235 content in the clamp is equal to or less than 5.0 wt%, the rings in the container shall be cleaned when the concentration reaches 50 g35U/(L glass).7.2.3 Non-fissile solids in the container
It shall be determined whether there are significant amounts of non-fissile solids, including glass corrosion products, in the container. Methods of identification include analytical methods that can determine the presence of suspended solids in the solution, visual observation of the ring surface, and recalibration of the free volume of the container. The allowable amount of non-fissile solids varies with the process used. Once there is evidence that these solids affect the mixing of the solution, the determination of the solution volume, or the discharge of the solution from the container, they must be removed. 7.3 Physical properties
The physical properties of the ring must be checked by visual inspection or mechanical testing of representative samples. The operating procedures must be used to ensure that the ring being checked is not replaced in a previous inspection. 7.3.1 Requirements for agitated rings
For toughened rings used in agitated situations, the samples must be subjected to mechanical vibration tests (see Section 5.5). If the sample ring does not meet the requirements of Section 5.5, all the rings in the container must be replaced. 7.3.2 Requirements for unstirred rings
Rings used in applications where the agitation is no greater than that which occurs when the solvent is mixed with air bubbling at a rate of about 5 x 10-” m\/s per square meter of cross-section must be qualitatively tested. Such testing consists first of visual inspection of the rings for defects such as nicks, cracks, fissures or scratches which could affect the mechanical strength of the rings, and then of a simple drop test on the used rings, comparing the observed breakage rate with the results of unused rings tested under the same conditions. Once it is clearly concluded that the strength of the ring has deteriorated, the ring in the container must be replaced.
7.3.3 Determination of the volume of Raschig rings
In addition to determining whether the apparent total volume of the Raschig rings has been reduced by sinking, In addition to the apparent reduction in volume due to damage and breakage (see 7.1), the actual loss of volume of the Raschig rings in the container must be determined by inspecting the check rings removed from representative areas of the container at specified time intervals. The volume of each ring must be determined based on its mass and thickness, and the following equation must be used to determine whether the ring condition is acceptable: ≥The volume fraction of glass required for a solution with a subcritical concentration of uranium or macadamia Vv
Where: V./V, the initial value of the volume fraction of the container occupied by glass, V - the volume of the check ring at the time of inspection
V is the initial volume of the check ring.
If any of the check rings does not meet the above criteria, the ring in the container must be replaced, or the volume of other Raschig rings in the container must be determined independently. The volume fraction does not fall below the minimum permissible value. The inspection rings must remain in the container at all times except for inspection periods not exceeding two weeks at a time or a total of four weeks per year. 7.4 Boron content of rings
7.4.1 Main inspection method
CB/T15146.6-94
The boron content of inspection rings taken from representative areas of the container must be analyzed. If the analysis results show that the boron content is less than 3.66wt%B (11.8wt%B,0,), the rings in the container must be replaced. The operating procedures must be used to ensure that the inspected rings have not been replaced by a previous inspection.
7.4.2 Alternative inspection method Www.bzxZ.net
The reduction in glass density of the inspection ring must be attributed to the precipitation of B, O; (unless chemical analysis shows otherwise). When the boron content is below the minimum value listed in 5.1.2, whether inferred from density or determined by chemical analysis, the rings in the container must be replaced. 7.5 Inspection Intervals
7.5.1 Cases as Primary Criticality Control In those containers using Raschig rings as primary criticality control, the inspection intervals for ring sinking (7.1), solid accumulation (7.2), physical properties (7.3), and solid content (7.4) shall not exceed 13 months for those cases where the rings are not agitated and the rate of concentration of the solution by evaporation does not exceed 10% per year. For those cases where the rings are agitated, the inspection intervals for ring sinking (7.1) shall not exceed 7 months. For those cases where the rate of concentration of the fissile solution by evaporation exceeds 10% per year, the inspection intervals for solid accumulation (7.2) shall not exceed 7 months.
7.5.2 As a supplementary criticality control means In those devices that use Raschig rings as a supplementary criticality control means, the time interval between two inspections of the rings may be twice the value listed in 7.5.1. If it can be proved that the container with the rings has not contained solution since the last inspection, only the sinking situation needs to be checked.
7.5.3 Special inspections
When Raschig rings are exposed to a surplus liquid with a hydrochloric acid concentration greater than 0.000 1 ml/L, a separate inspection frequency must be specified to confirm that the chemical and physical properties of these rings remain within the ranges listed in Chapter 5 "Technical requirements for Raschig rings". 8 Subcritical concentration limits for liquids that are prone to sinking
Table 1 lists the subcritical concentration limits for solutions stored in containers of any size but containing Raschig rings that meet the requirements of this standard. The concentration of hydrogen in the solution shall not be less than 75 g/L and shall not be greater than 115 g/L1\. The limits in the first column apply to axial isotopic compositions with z5U>5 wt% and 23U≤1.0wt%. The limits in the second column apply to uranium with 235U≤5wt% and 2U≤0.01wt%. The limits for cyclic solutions apply to cyclic solutions with the following isotopic compositions: \Pu≥50wt%, 21Pu≤15wt% and 2*Pu≥z1Pu. Note: 1 An upper limit is required for the hydrogen content of the solution to exclude the application of the relevant provisions of this standard to certain organic bath agents whose hydrogen content may exceed this range.
Table 1 Subcritical concentration limits for homogeneous solutions of fissile material in containers of any size but containing glass-free Rasch rings of tantalum Isotopic composition, wt%
Glass in container containing rings
Minimum volume fraction
(vol%)
5.05U≤100
0.7U≤5.0
Pu15,Pu>2Pu
Maximum allowable liquid concentration"
Note: 1) The oxygen concentration in the falling liquid shall not be less than 75 g/L nor greater than 115 g/L. 2) Any fissile material deposited in the form of solids must be included in the floating concentration. g Pu/L
zoPu>5
g Pu/L
Room number
Container number
Solution inside
GB/T 15146.6-94
Appendix A
Inspection table for ring-filled container (example)
(reference)
Container label
Time of last ring filling
Parameters of Raschig ring
Initial B,O, content
Subcritical concentration limit
Concentration of hydrogen in solution
Volume share of glass
Inspection of solid matter
Amount of ring added
Ring position||tt ||Additional Notes:
Type and Results
This standard was proposed by China National Nuclear Corporation. This standard was drafted by the Institute of Nuclear Science and Technology Information, and the main drafter of this standard was Li Jiafan.
Raschig Ring Supplier or Manufacturer
Purchase Order Number
Ring Physical Properties
This standard is equivalent to the American National Standard ANS1/ANS8.5--1986. Mechanical Test
B,O): Content
InspectorThe inspection interval for the inspection of the solid accumulation (paragraph 7.2) shall not exceed 7 months. For those cases where the rate of concentration of the fissile solution due to evaporation exceeds 10% per year, the inspection interval for solid accumulation (paragraph 7.2) shall not exceed 7 months.
7.5.2 As a supplementary criticality control means In those devices using Raschig rings as a supplementary criticality control means, the time interval between two inspections of the rings may be twice the value listed in paragraph 7.5.1. If it can be proved that the container with the rings has never contained solution since the last inspection, only the sinking condition needs to be checked.
7.5.3 Special inspections
When Raschig rings are exposed to a rich solution with a hydrochloric acid concentration greater than 0.000 1 ml/L, the inspection frequency must be specified separately to confirm that the chemical and physical properties of these rings remain within the range listed in Chapter 5 "Technical requirements for Raschig rings". 8 Subcritical concentration limits for volatile liquids
Table 1 lists the subcritical concentration limits for solutions stored in containers of any size containing Raschig rings meeting the requirements of this standard. The concentration of hydrogen in the solution shall not be less than 75 g/L nor greater than 115 g/L1\. The limits in the first column apply to uranium isotopic compositions of z5U>5 wt% and 23U≤1.0 wt%. The limits in the second column apply to uranium with 235U≤5 wt% and 2U≤0.01 wt%. The limits for solutions of rings apply to rings with the following isotopic compositions: \Pu≥50 wt%, 21Pu≤15 wt% and 2*Pu≥z1Pu. Note: 1 An upper limit is required for the hydrogen content of liquids to exclude the application of the provisions of this standard to certain organic bath agents whose hydrogen content may exceed this range.
Table 1 Subcritical concentration limits for homogeneous solutions of fissile material in containers of any size but containing glass-free Rasch rings of tantalum Isotopic composition, wt%
Glass in container containing rings
Minimum volume fraction
(vol%)
5.05U≤100
0.7U≤5.0
Pu15,Pu>2Pu
Maximum allowable liquid concentration"
Note: 1) The oxygen concentration in the falling liquid shall not be less than 75 g/L and shall not be greater than 115 g/L. 2) Any fissile material deposited in the form of solids must be included in the floating concentration. g Pu/L
zoPu>5
g Pu/L
Room number
Container number
Solution inside
GB/T 15146.6-94
Appendix A
Inspection table for ring-filled container (example)
(reference)
Container label
Time of last ring filling
Parameters of Raschig ring
Initial B,O, content
Subcritical concentration limit
Concentration of hydrogen in solution
Volume share of glass
Inspection of solid matter
Amount of ring added
Ring position||tt ||Additional Notes:
Type and Results
This standard was proposed by China National Nuclear Corporation. This standard was drafted by the Institute of Nuclear Science and Technology Information, and the main drafter of this standard was Li Jiafan.
Raschig Ring Supplier or Manufacturer
Purchase Order Number
Ring Physical Properties
This standard is equivalent to the American National Standard ANS1/ANS8.5--1986. Mechanical Test
B,O): Content
InspectorThe inspection interval for the inspection of the solid accumulation (paragraph 7.2) shall not exceed 7 months. For those cases where the rate of concentration of the fissile solution due to evaporation exceeds 10% per year, the inspection interval for solid accumulation (paragraph 7.2) shall not exceed 7 months.
7.5.2 As a supplementary criticality control means In those devices using Raschig rings as a supplementary criticality control means, the time interval between two inspections of the rings may be twice the value listed in paragraph 7.5.1. If it can be proved that the container with the rings has never contained solution since the last inspection, only the sinking condition needs to be checked.
7.5.3 Special inspections
When Raschig rings are exposed to a rich solution with a hydrochloric acid concentration greater than 0.000 1 ml/L, the inspection frequency must be specified separately to confirm that the chemical and physical properties of these rings remain within the range listed in Chapter 5 "Technical requirements for Raschig rings". 8 Subcritical concentration limits for volatile liquids
Table 1 lists the subcritical concentration limits for solutions stored in containers of any size containing Raschig rings meeting the requirements of this standard. The concentration of hydrogen in the solution shall not be less than 75 g/L nor greater than 115 g/L1\. The limits in the first column apply to uranium isotopic compositions of z5U>5 wt% and 23U≤1.0 wt%. The limits in the second column apply to uranium with 235U≤5 wt% and 2U≤0.01 wt%. The limits for solutions of rings apply to rings with the following isotopic compositions: \Pu≥50 wt%, 21Pu≤15 wt% and 2*Pu≥z1Pu. Note: 1 An upper limit is required for the hydrogen content of liquids to exclude the application of the provisions of this standard to certain organic bath agents whose hydrogen content may exceed this range.
Table 1 Subcritical concentration limits for homogeneous solutions of fissile material in containers of any size but containing glass-free Rasch rings of tantalum Isotopic composition, wt%
Glass in container containing rings
Minimum volume fraction
(vol%)
5.05U≤100
0.7U≤5.0
Pu15,Pu>2Pu
Maximum allowable liquid concentration"
Note: 1) The oxygen concentration in the falling liquid shall not be less than 75 g/L nor greater than 115 g/L. 2) Any fissile material deposited in the form of solids must be included in the floating concentration. g Pu/L
zoPu>5
g Pu/L
Room number
Container number
Solution inside
GB/T 15146.6-94
Appendix A
Inspection table for ring-filled container (example)
(reference)
Container label
Time of last ring filling
Parameters of Raschig ring
Initial B,O, content
Subcritical concentration limit
Concentration of hydrogen in solution
Volume share of glass
Inspection of solid matter
Amount of ring added
Ring position||tt ||Additional Notes:
Type and Results
This standard was proposed by China National Nuclear Corporation. This standard was drafted by the Institute of Nuclear Science and Technology Information, and the main drafter of this standard was Li Jiafan.
Raschig Ring Supplier or Manufacturer
Purchase Order Number
Ring Physical Properties
This standard is equivalent to the American National Standard ANS1/ANS8.5--1986. Mechanical Test
B,O): Content
Inspector
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