Verification Regulation of Personal Warning Devices for X and γ Radiations
Some standard content:
National Metrology Verification Regulations of the People's Republic of China 3JG962--2001
X, radiation personal alarm device
Personal Warning Devices for X and y Radiations2001-06-05 Issued
2001-10-01 Implementation
State Administration of Quality Supervision, Inspection and Quarantine Issued
J.IG 962--2001
X, radiation personal alarm device
Verification Regulations
Verification of Fersonal Warning Devices for X and y RadialierxJ.IG 962--2001
This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on June 5, 2001, and will be implemented from October 2001.
Responsible unit: National Ionizing Radiation Metrology Technical Committee Drafting unit: Shanghai Institute of Metrology and Testing Technology This regulation is interpreted by the National Ionizing Radiation Metrology Technical Committee. Main drafters:
Chen Jianxin
Liu Shulin
JJG 962
(Shanghai Institute of Measurement and Testing Technology) [Shanghai Institute of Measurement and Testing Technology] 2
Model·
References
3 Terms and units of measurement
3.1 Terms·
3.2 Units of measurement...
4 Overview·
5 Metrological performance requirements
5.1 Radiation performance,
5.2 Reporting·
General technical requirements for epidemic prevention
6.1 Appearance and structure 6.2 General requirements 6.3 Calibration factors 6.4 Reading device Measurement instruments 1 Verification conditions Verification items and verification methods 3 Processing of verification results 4 Given periodicity 1.1 Verification conditions 1.1 Verification items and verification methods 3 Processing of verification results 4 Given periodicity 1.1 Verification conditions 1.1 Verification items and verification methods 3 Processing of verification results 4 Given periodicity 1.1 Verification conditions 1.1 Verification items and verification methods 3.1 Verification results Processing 4 Given periodicity 1.1 Verification conditions 1.1 Verification conditions 1.1 Verification conditions 1.1 Verification conditions 1.1 Verification conditions 1.1 Verification conditions 1.1 Verification conditions 1.1 Verification conditions 1.1 Verification conditions 1.1 Verification conditions 1.1 Verification conditions 1.1 Verification conditions 1.1 Verification conditions KH, (10) the recommended value of the conversion coefficient is attached to the verification certificate format
X, radiation personal alarm verification procedures
This procedure mainly adopts the international engineering plan Beihui 13-range radiation monitoring equipment and? Leading radiation personal device? 1 individual inflammation version, the energy range of the box system, the selection of the whole seven vehicles, the determination of the appropriate point of deep non-human agent equivalent rate, and the technical verification method of the design and inspection of the social energy are all based on the original standard "full use of my requirements" Zhang Chunzhao Gang standard (41 X, vehicle alarm for individuals, 1 range
small standard hope to follow up the use of a,: short-range personal alarm device for the first hospital calibration, continued determination and joint inspection, this alarm technology is carried on the human body: when usually a single part is exposed to X, the vehicle irradiation or radiation effect of a false alarm with a deep dose of a significant rate of the alarm signal: X, energy range of 50k:V1.5MV2 cited literature
This process uses the following literature:
TFr:134:Radin:o: prelticr instrrenalicr—Monicring EuiprnlPesonnwarring tlev:ccs for X and garima rcierions Ilyooj[CRl: Repcrt 47:Meastrenert of dse equ:vaier: Iro txrcnial pho.r: Ful t:ca:Lrurradiatics (1992)
B20川：变泄剂母仪其率仪及确定能年查询應應８７，将參考箱3
G_4323—1593X、編射个人报仪等仪用川本规和 ... 3.1.2 Alarm indicator (wnrniinilim) The alarm signal issued by the alarm device in the unit workroom is the ratio of the ring rate to the flash rate. In the effective alarm column, the alarm indication is the ratio of the annual rate of the individual dose. 31.3 The ratio of the effectiveness value of the calibration of the individual dose rate to the alarm indicator 31.4 The effective range of the alarm device that meets the requirements of this regulation is: 3.15 dose r:
The human dose is the soft tissue dose equivalent of the deep affected part of the specified point on the body. For HJG962-201
The depth of the strong radiation penetration is -10mm, so) is (0), which means the deep personal dose is equivalent.
3.2 Measurement units
3.2.1 The measurement unit of deep personal dose rate (10) is Sv or fractional unit (pv-h-1, mSh).
3.2.2 The measurement unit of alarm indication is -1 or min. 4 Overview
X, X radiation personal alarm instrument (hereinafter referred to as alarm instrument) is mainly composed of radiation detection, electrical measurement components and alarm (sound or sound and light alarm) components. These components are assembled into a whole. When the X is temporarily intruded, the detector generates a certain type of electrical signal, which is detected and processed by the measurement display components. When the deep personal dose rate reaches a predetermined level, the component will sound a sound or a combination of sound and flash signal to provide a warning to the examinee. The alarm device is divided into two categories according to its alarm function: the first type of alarm device has one or two alarm values, and it will alarm only when the deep personal dose rate reaches or exceeds a certain warning value; the second type of alarm device has a continuous alarm indication function, and its technical indication is proportional to the deep personal dose equivalent: the third type of alarm device has both the functions of the second type and the third type of alarm device: 5 Metrological performance requirements
5.1 Radiation energy | |tt||The transmission performance of the alarm device must meet the requirements of the table. Table 1. Transmission performance requirements
Analysis of inherent error
Alarm value adjustment
Angle loudness
Alarm sound
Technical requirements
Effective band strength within the range of not more than 30%
For all alarm networks, this period is: 30 tight itk.V.-1.MeV solid cabinet For the range of not more than 30%, not more than 4%, not more than 137c, not more than 20% alarm type
Ⅱ, m
JJG 962—200!
At 30e from the alarm device, the alarm sound pressure level should be within the range of 80B (A) to 100dB (A):
6 General technical requirements
6.1 Appearance
The outer side of the alarm device must be smooth, solid, durable, dustproof and rainproof. The belt clip connected to the outer pot should be able to ensure the proper orientation of the detector. The optical alarm component should be set in a position that is not worn and led to the visible position. If necessary, a protective device can be attached. 6.1.2 Switch
The alarm instrument shall not have an external switch. If necessary, the switch shall be installed in a hidden part to prevent misoperation: 6.1.3 Marking
The alarm instrument shall be marked with a visible mark indicating the reference point, and the model, number, manufacturer and other marks on the nameplate shall be clearly identifiable.
6.2 General requirementswww.bzxz.net
The characteristics of the alarm instrument shall comply with the requirements of GB14323-1993, that is, the volume shall not exceed 10cm5cm×2cm.m (excluding the signal), the weight shall not exceed 100, the surface shall be easy to decontaminate, and the effective alarm range shall be within 1rSv·h-1Svh+ at least 3 orders of magnitude: 6.3 Calibration||tt ||The manufacturer shall provide the calibration data of the instrument in the report or document without the instrument. If the inspection unit cannot provide this data, it may ask the inspection unit to make the measurement before the inspection. 4 Reading device
For the following type of alarm instruments, the manufacturer shall provide a suitable reading device to measure the mask signal of the detector: the signal read shall be considered equivalent to the alarm indication. 7 Control of measuring instruments
The measuring instruments include: calibration, subsequent calibration and in-use inspection. 7.1 Verification conditions
7.1.1 Multiple-number radiation
7.1.1.1 The optional X, ? reference radiations are listed in Table 2. These radiations are part of the reference radiation series specified in GB12162-1990, among which the filtered X radiation is a narrow group. Their equivalent generation conditions are shown in Appendix A. 1.1.21.? The variable range of the air kerma rate generated by the recorded radiation at the calibration point should be at least 1-1tnGyh. The long-term value of the air kerma rate generated by the radiation at each calibration point should not be less than 1mtya
7.1.1.3 The radiation at the calibration point should be a nearly parallel and unidirectional collimated beam, and can cover all the individual models. In the plane that passes through the center of the detector and is perpendicular to the beam line when the radiation is confirmed: the change of the air kerma rate at each point within the total radius of the alarm instrument should not exceed =3%
JJG 962—2001
Table? Use: narrow push tube no ×, capacity consideration injection X said key
7.12 deep personal present when the main amount of soldiers value of the fixed cat
24-A (59.S ksV)
es :552 keVs
( 1.17 MaV, 1.33 MeV:
,, 2, 1 Information provided by the office or the room atmosphere relative kinetic energy release of the actual point of the team protection level of the high room beauty dose free instrument measurement, the address value of the virtual tide source to the national radiation depth. 7.1.2, 2 Air relative energy release method and the relationship between the radiation rate is as follows (1): K = W
Where: K
gas relative energy, h-:
radiation rate, (kzh)
- the average energy consumed by the formation of electrons in the air, the mountain recommended;
% primary replacement L, the energy of the particle in the form of tree number radiation additional fire, for low energy box radiation, -0; xc, 5 0.3%..
7.1.2.3 The personal dose base rate is derived from the air release kinetic energy rate at the same point in the air (10) mountain, and is aggregated with the acceleration coefficient (10) (the value of (10) is not recorded 13): H,10)
f10)K,
The deep human dose main rate silk safety true value expansion is not determined by the industry and is not 1% (confidence level 7.1.2.4
7.1.3 The equipment will be complete
7.1.3.1 Read the socks
After the body penetration inspection, use the meter to touch the human body [rate of the part" is called the effective mutual chain inspection according to the warning: the measurement starts from the one and appropriate model body length RU recommended by the Sichuan organic collection system total flat rest model, its external size is 3030 cmx1s cm 7.1.3.2 This teaching
use! An stomach phantom and Xie Ding H (10) of the depth of the detector, so that it can be placed: fixed range of rats can or can be located in 4
J3062-201
and the field: the location of the sinking with optical system measurement, can be displayed or its fixed distance source full detector distance -
7.1.3.3 monitoring electricity room
text generator built to pay attention to the timing, out of the monitoring of the relevant F objects out of its changes. 1.3.4 city monitoring equipment
can be a sound protection equipment: can only be a piece of pulse counting example: 7.1.3.5 thermometer
initial measurement range is -t, the minimum division The value is not more than 0.27.1.3.G4 The pressure test range is 86-116k, the minimum scale is not more than 0.1k7.1.3.7 The upper limit of the timer is not more than 0.1k, and the minimum scale value is not more than 0.7.1.3.8 The sound tester is used to measure the sound level of very loud sound. A three-level sound pressure meter can be used.1.4 Laboratory environmental conditions7.1.4.1 The temperature of the test is within the range of 15-25. The temperature change during the test is not more than 27.1.4.2 The sensitivity of the laboratory machine is not more than 10008%.7.1.4.3 The air dose rate of the test is not less than 0.25μGy. .2 Verification items II and verification methods
2.1 Verification information
Initial verification of alarm device
Continuous verification and in-use verification The items to be verified are listed in Table 3.
Verification items
Verification completion date
For fixed, low value
Technical
Warning sound
User verification
Verification
Use 3. "For this reason, it is necessary to use the relative inherent error J.IG962-2001. 2.3.1 For the first time, two points should be selected in each decade of the effective range for verification. These two points are respectively around 30% and 91% of the maximum vertical of the machine base level. For For subsequent calibration and in-use inspection, two points, the most sensitive level (20%) and the least sensitive level (0%), should be selected for calibration within the effective control process. 7.2.2.3 For each calibration point, the deep personal dose rate is measured by the meter (10) and the alarm indication N of the alarm placed on the phantom 1 is measured by the sound monitoring device. Then the analytical error E of each point is calculated according to formula (3): H(10) ×100%
where C is the calibration function of the alarm instrument for 137C radiation (3)
.2,2.4 If the difference between any calibration point and the calibration point exceeds two (+) coupons, the alarm instrument is considered to have a fixed recognition error of the whole table 1. Here, the expansion of 10) expressed as a fraction is not: 7.2.3 Deviation of these values
7.2.3.1 Set the alarm reading to the value of, and place the alarm position on the companion mold, set a 17 7.2.3.2 Place the upper alarm device in the middle of the Ca radiation field and irradiate at a place where the personal dose is deep and the equivalent rate is 1.3 (1 + 2 light). Measure the time from the start of irradiation to the alarm signal. The value should meet the requirements of (4! or 5):
H.tl0μSy
7.2.3.3 If the required The alarm instrument has several discrete adjustable alarm reading nominal values. This verification shall be performed for each value.
7.2.3.4 The alarm value shall be as continuous as possible. At least one sample point shall be selected in each decade within the effective alarm range, and the sample point shall include the maximum value of the effective alarm range. 7.2.4 The maximum response
? .2.4.1 Select at least 5 types of radiation from the reference radiation listed in 2 for this verification. These radiations shall include the lowest energy radiation (65keV or 5Am) and C radiation? .2.4.2 The deep personal dose equivalent rate shall be selected between 20% and 8% of the maximum value of the alarm instrument's effective alarm range. For different radiation energies: the same dose equivalent rate should be used as much as possible. If this cannot be done, it should be corrected by using experimental data with errors when necessary. 7.3.4.3 Place the base alarm instrument placed on the phantom in each selected reference radiation in turn. In the field, the alarm indicator G
J3G962-1001
indicates N, (instead of the first, the radiation mass of the vehicle) the corresponding detection unit personal dose when the single rate agreed value is 10) using the method described in 7.1.2 to measure the basis
7.2.4.4 If the result of the static energy for each of the ten energies satisfies formula (6), then it is considered that the energy response of the detected alarm meets the requirements of Table 1,
NHu(10)
0.7 8(183 ≤1.3
or in, represents -Cs reference radiation measurement is alarm indication 7.2.5 Angle response
7,2.5.1 Use 13Cs radiation and 1A section new book (or 60keV filtered X-radiation) to carry out this test respectively. The radiation direction must be changed on two mutually intersecting planes perpendicular to the front surface of the alarm. These two planes are parallel to the face and end face of the alarm respectively.
7.2.5.2 Place the alarm instrument on the phantom and place it in a certain position in the auxiliary radiation field so that the deep personal dose rate is within 20%-8% of the maximum value of the effective alarm range. Irradiate according to the calibration direction (the radiation angle is set to 0 at this time), and the alarm indication Na is delayed.
.2.5,3 While keeping the center position of the detector unchanged, rotate the phantom to change the incident direction, and measure the alarm indication N when the incident angle α is 130\ and 1(0)\ in turn. After burning, calculate the ratio NN7.2.5.4 If all the ratios N,/N. meet the two relationships (7) and (8), it is considered that the angular response of the detector under test meets the requirements of Table 1.
For 137C3 radiation, it should meet the following requirements:
.8 rj A/N, 1.2 r
For 21Am? radiation (or 60keV filtered X-ray radiation), it should meet the following requirements: 0.5 r: $. N./Nu 1.5 r?
The r in (7) and the r in (8) represent the applicable ten 17C? radiation respectively:The calculated value of the ratio of the α response of the Am filter (or keV filtered x-radiation) to the zero response is listed in Table 1. Table 4 The ratio of the response to the sound,
Radiation source
Am
7.2.6 Alarm response
Light energy kv
59.5kV
60kV
Analects
α= bu
962—2001
7.2.6.1 Move the sound tester to the x alarm rapid-onset location and 30m away from it. When the alarm only emits an alarm sound, record the stop value of the tester. 72.2 The test is conducted 3 times, and the average value should be within the range of 8 B (A) [) (A) 7.3 Handling of verification results
.3.1 If the verification is qualified, a verification certificate will be issued to the alarm instrument. If the verification is unqualified, a verification result notice will be issued, and the unqualified items will not be specified.
.3.2 The format of the inner page of the verification certificate is shown in Appendix 7.4 Verification cycle
The verification cycle of the alarm is generally not more than one year.
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