ML20039B897
| ML20039B897 | |
| Person / Time | |
|---|---|
| Site: | 07002302, 07100446 |
| Issue date: | 11/25/1981 |
| From: | Nett D ARMY, DEPT. OF |
| To: | Davis F NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| Shared Package | |
| ML20039B892 | List: |
| References | |
| NUDOCS 8112280026 | |
| Download: ML20039B897 (8) | |
Text
,
DEPARTMENT OF THE ARMY U S ARMY ABERDEEN PROVING GROUND ABERDEEN PROVING GROUND. M ARYLAND 21005 NT IstYou or STEAP-SA
SUBJECT:
Nuclear Regulatory Commission Request for Additional Information in Support of Renewal Application of Special Nuclear Material License Number SNM-1649 - Aberdeen Proving Ground THRU:
Conmander US Army Test & Evaluation Command ATTN:
DRSTE-ST Aberdeen Proving Ground, MD 21005 Commander US Army Materiel Development & Readiness Command ATTN: DRCSF-P 5001 Eisenhower Avenue Alexandria, VA 22333 T0:
Director of Nuclear Material Safety & Safeguards Materials Licensing Branch, F. Davis US Nuclear Regulatory Commission
~ Washington, DC 20555 1.
Reference Mail Control Number 19365, 2.
The following information is submitted in reply to your request dated 19 Oct 81, concerning our application dated 25 Mar 81, for renewal of License Number SNM-1649.
3.
Instrument calibration. Alpha and gamma detection equipment is used to monitor special nuclear material.
Step-by-step procedures for calibration of this equipment are given in Inclosure 1.
Also, we comply with DARCOM Regula-tion 385-25.
Paragraph 29 of this regulation, which deals with instrument calibration, is given in Inclosure 2.
4.
Fi.lm badges. The frequency for changing film badges is monthly.
C
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STEAP-SA
SUBJECT:
Nuclear Regulatory Commission Request for Additional Information in Support of Renewal Application of Special Nuclear Material License Number SNM-1649 - Aberdeen Proving Ground 5.
Radiation survey program. We comply with DARCOM Regulation 385-25.
Paragraph 17 of this regulation, which gives the type and frequency of radia-tion surveys, is given in Inclosure 3.
F0P ThE COMMANDER:
hk.hll Nss 3 Incl DAL M. NETT as Safety Director 2
CALIBRATION PROCE_ DURE - ALPHA INSTRUMENTS 1.
Refer to manufacturer's technical manual for instrument operation -
procedures.
2.
Use Eberline plutonium alpha calibration standards, set of 4.
3.
Turn instrument "0N."
4.
Set selector switch in alpha counting position if applicable.
5.
Set scale switch to the X1.0 position.
6.
Check battery condition.
7.
Check background CPM.
8.
Set discriminator adjustment using procedure in manufacturer's technical manual.
9.
Remove protective cover from detecter and place detector on the applicable standard source.
- 10. Adjust the XI.0 calibration pnentiometer until the average meter reading matches the CPM of the standard source.
- 11. Rotate the detector on the source 180 degrees and observe the average meter reading.
If this reading differs from the source CPM, adjust the calibration pctentiometer until the average of ~ the two readings equals the standard source CPM.
Lock the calibration control. The two readings above should not deviate from the standard source CPM by more than 10 percent.
- 12. Calibrate at two points on each scale, with the two points separated by at least 50 percent of the scale.
13.
Repeat steps 9 through 12 for the other scales, changing scale switch and standard source as required.
14.
Recheck the discriminator adjustment and reset if necessary.
15.
If the discriminator is readjusted, the entire calibration must be rechecked.
- 16. Turn the instrument "0FF."
Incl 1
CAllBRATION PROCEDURE - GAMMA _ INSTRUMENTS
'l.
Refer to manufacturer's technical manual for instrument operation procedures.
2.
Use calibrated gamma source range.
CAUTION: The gamma field can be -
injurious to personnel. Apply normal gamma range precautions.
3.
Turn instrument "0N."
4.
Set scale switch to most sensitive position (X.01 on Eberline E500-B,-
for example) and check battery condition.
5.
Place the instrument on the gamma range at a position that will yield approximately 3/4 scale reading.
6.
Allow sufficient time for the instrument to stabilize, then idjust the appropriate calibration potentiometer so the meter indicates the correct value for that position. The reading should not deviate from the standard source reading by more than 10 percent.
7.
Calibrate at two points on each scale, with-the two points separated by.
at at letst 50 percent of the scale.
8.
Repeat steps 5 through 7 for each of the other scales.
9.
Turn the instrument "0FF."
Incl 1
~
29.
Radiac instrumentation, a.
Sufficient radiac instruments will be available to properly support the use of radiation source's. The instruments will be capabic of detecting the types and levels of radiation involved and any possible resulting contamination, b.
Personnel monitoring devices will be immediately available in areas in which radioactive materials are handled.
All instruments used for radiation protection will be cali-c.
brated at icast every 3 months, and af ter each maintenance or battery change. More frequent calibration will be necessary for instruments which receive heavy use.
Dosimeters need to be calibrated only at 6-month intervals.
Dose rate instruments used to determine time of stay and crpo-sure estimates should be cc11brated at a minimum of two points on each instrument scale. The insttuments will be labeled with DA Labe'l 80 (U.S.
Army Calibration System) to show the date of the last calibration, source or method used for calibration, and the initials of the calibrator, d.
Faulty instruments will be tagged with DA Form 2417.Junservice-able Test Instrument or Standard) to prevent their being used before having been repaired.
Each instrument used for radiation protection should be pro-e.
vided with a check source or test sample.
f.
Pocket dosineters should be calibrated every 6 month.s.' At the time of calibration. the correction factor for the dosimeter should be determined.
Dosimeters which leak more than 5 percent of full scale af ter 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> in a radiation free area or which have an error of more than 10 percent should be repaired.
Dosimeters should be calibrated by exposing them to known sources of an energy level comparable to that which the dosimeter will be exposed during use.
Each dosimeter will bear a label showing the cor.ection factor and the date of calibration. The cor-rection factor is determined by dividing the actual level of radiation by the indicated 1cvel.
g.
Dosimeters are used to give the wearer an estimate of his exposure while receiving the dose, in order that he may limit himself to permissible levels. Disagreement between dosimeter and film badge measure-ments is to be expected. The film badge reading will be used as the offi-cini dose for record purposes unless the badge is proven to have recorded an incorrect exposure.
h.
Instrumentation must be selected based on the type and level of radioactive material and/or radiation to be encountered.
In high radia-tion areas, it is desirable to have a high-range survey meter in addition tc a low-range meter, in order to cover the range of dose rates likely to be encountered.
i.
If funds permit, duplicate radiation protection instruments should be available. The duplicate instruments will avoid the necessity oi shutting down a radiological operation until an instrument can be re-paired or replaced.
Inc1 2
A*
17.
Radiation surveys. Surveys should be made under representative conditions. The following describes certain types of radiation surveys.
a.
Initial surveys.
An initial survey will be made by the radiological protection officer of sites and areas where sources'of radia-Pion will be used and/or stored before an operation involving radiation is initiated or operational changes are approved, or upon installation of a device which produces ionizing radiation.
b.
Routine surveys.
(1) Surveys of each area in which sources of radiation are used and/or stored shall be performed by or under the direction of the radiological protection officer at Icast once cach month. The radiation hazards incident to the production, use, release, disposal,or presence of radioactive materials or other sources of radiation will be evaluated.
Such an evaluation includes a physical survey of the location of materials and equipment, measurements of levels of radiation and/or concentrations of radioactive material in and around the site.
Conditions of stable storage may be exempted from monthly surveys at the discretio6'nf the local radiation control committee.
However, the intervals of surveys of storage ntcas will not execed 3 months.
(2) The area survey will be performed using suitabic in-struments, and, when appropriate, smear and air sampling techniques. Work habits of personnel should be observed to.obtain data regarding additional sites to be monitored or areas of improvement for the operational procc-dures. Locations of the monitoring points with the results, statement of the hazard, and any recommendations as to decontamination, shiciding, procedural changes, etc., will be recorded and filed.
In addition to the surveys'in a and b above, special surveys c.
are required in the event of the following occurrences:
(1)
Shipment or receipt of radioactive materials. Packages and the unloaded vehicles must be surveyed.
(2) Termination of a project involving radioactive materials.
A survey is required to determine that no contamination exists and that sources of radiation are properly stored or have been disposed of properly.
(3) Unplanned events. Loss of control, spill, overexposure, or any unplanned event which could adversely or did adversely affect the safety of the operation must be monitored.
Control must be re-established to prevent the hazard from increasing.
(4) Hazardous operations. Particularly hazardous operations, such as decontamination, encapsulation, or smelting of radioactive materials, as authorized by AEC license or DA authorization, must be continually monitored.
d.
All places, equipment, persons, and animals suspected or known to have been in contact with radioactive material will be monitore'd for contamination. Personnel must be monitored before eating, smoking, chew-ing, drinking, or 1 caving the area in which radioactive materials are located.
Inci 3
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DEFARTMENT OF TliC APMY s i U L Afi'iY ADEPDlTN P fi O \\'l's G '.S O U N D r
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STEAP-SA 13 Nov 81 i
I SU3 JECT:
NRC Request for Additional Informtion in Support of P.cnewal Application for L icense 5."M-168 i
r L
L i
Co mander US Army Test & Evaluation Cc~nend ATT'h DRhiE-51 (Ms. Falcateer)
Aberdeen Proving Ground,!iD 21005 r
i b
1.
The following infer mtien on instrumut calibration is subaitted as f
recIues ted. For each of three calibration sources the followino information r
is given-tranufacturer, ru'el nuzber. nuclide, cuantity of rcdicactive i
ceterial, cccuracy cud traceability to a primary standard.
a.
Oak Rid-;e National Laboratories, Fcdel 120C-1. Cs-127. Pa curies, accura te to f_10 carccnt, traceable to Naticaal Bureau of-Sand 6rds.
b.
Eberline, Model 594-2, PU-239,,.six sources:
8.400x102 CPM, 6 7.533x103 CPM, 8.793x104 CFil, 3.463x10" chi, 2,446x105 CPM, 5.0 W ;0 CP is all accurate to + 10 percent, traceable to National Dureau of Standards.
f r
c.
J.L. Shepherd and Associates, ibdel 28-5, Cs-137,100 millicuries, accurate to i 10 percent, traceable to 'stional Pureau of Standards.
- t 2.
The pertinent experience of the person who performs the calibratien is 4
attached as Inclosure 1.
FOR T!!E CC:MA*;0ER-(\\
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1 Incl DAL M. NETT as Safety Director L
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_E_D._UC AT_I O._N i
Physical Science,,ujar, 2
-'a r s (197!-1901) t!est Virgiria Univeri t/.
Ma th and Phy: iu, 35 si mscer innes credit. Johns Mc p'< i n Un i ve r s i t y (night school)
I!Ol-1966.
t Basic R.iaiologit.al nealth cnd Occupatienal Radiological i?calth, Pub l i c Hea ? 'i Se rv i ce School, T'oc kv i.I le. tR: ry i and.
l t;uclear 2-
'rnency l_m Operation,, US Army School, Sandia Ease, Th' ' Mex i (included session on alpha calibration techniques).
i Air Cleaning and Filtratiu.1, I:arvard Schco! of Public Heal'th', Coston, Ma s s ac h e a e t. t s.
Training Coucse in hdiation Ins trument Calibration, f.ex i rg t on Clue Crass Army Depot.
4 6
I E VERIENCE- - - ~ -
)
0 alth Physics Technician. USA Huc1 car Defent.a Labaratory (f;DL). Edgc.< cod Ar s ena l, lia ry l and, 19ti2-1972.
I i
Calibration Technician, NOL, Ballistic Research Laboratory, and Acerdeen Proving Ground, 1963 present.
U. S. Arre/ R ACCON Team N,ber. 1963-1976, j
Health Fnysics Operator, Army Pulse Radiation Fac i li ty, Aberdeen P rov i ng 'iround, Maryland, 1972 present.
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