ML20126A652
| ML20126A652 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 06/04/1985 |
| From: | Baer R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | Winso J GENERAL ATOMICS (FORMERLY GA TECHNOLOGIES, INC./GENER |
| Shared Package | |
| ML20126A656 | List: |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-1.F.1, TASK-TM NUDOCS 8506130417 | |
| Download: ML20126A652 (3) | |
Text
- p aso k,
UNITED STATES A
NUCLEAR REGULATORY COMMISSION o
O hj WASHINGTON, D. C. 20555
%****/
Jifi 4 1985 Mr. Jim Winso, Engineering Manager GA Technologies, Inc.
P.O. Box 81608 San Diego, California 92138
Dear Mr. Winso:
Enclosed is a copy of an NRC Regional feedback memorandum that was referred to my branch concerning a licensee's experience with one of your company's radia-tion monitors. The Region 5 information describes a potentially generic problem with a GA wide-range gaseous effluent monitor.
Basically, proper positioning of the radiation detector is reportedly so critical that only minor detector misalignment (possibly caused by opening / closing the access door to detector chamber) can lead to major inaccuracies in resultant effluent readings.
Since GA responded in 1983 to the problem of proper detector positioning (in response to calibration problems at San Onofre), and reported to us implementa-tion of a generic fix to enhance monitor performance, we would like you to e
examine information provided and determine if you believe a generic problem with detector positioning may still exist.
We would suggest your review might focus on the potential for other users having a detector positioning problem and being unaware of it for periods as long as the 18 months normal calibration cycle.
(In normal-range effluent monitor systems a running, periodic opera-tional comparison can be made between the laboratory analysis of routine grab gas samples from the effluent stream and the coincident effluent detector reading, thereby checking for consistency of detector efficiency.
- However, this high range accident monitor has no similar routine, running comparative check for operability.)
As you and Mr. James Wigginton of my branch discussed on May 17, my branch's responsibility is to identify and resolve potentially generic industry prob-lems.
When appropriate, this responsibility also includes notifying industry via an information notice or other document.
If validated, the reported detector positioning problem would have generic implications.
We would like your company to review the information provided and attempt to resolve this issue.
Please note that the plant's technical contact is given in the enclo-sure (Scarano-Jordan memo).
Assuming that you verify a problem exists, we would want to know:
(1)resolu-tion of the problem, and (2) plans to disseminate information to potentially affected customers.
In cases such as this, when the vendor's resolution is i
l reasonable, successful and technically thorough, we typically do not issue a notice to industry, thus avoiding duplication of efforts.
N-2@(2 8506130417 850604 ADOCK O 26
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If.you have any questions during your review effort, please call James Wigginton (301-492-4%7) or me (301-492-4780).
Sincerely, Robert L. Baer, Chief Enginnering and Generic Comunications Branch Division of Emergency Preparedness and Engineering Response Office of Inspection and Enforcement
Enclosure:
As stated DISTRIBUTION
. R.. H. Vol_lmer, IE E. L. Jordan, IE J. G. Partlow, IE B. K. Grimes, IE S. A. Schwartz, IE R. L. Baer, IE L. J. Cunningham, IE D. P. Allison, IE G. Yuhas, RV J. Wigginton PDR 20CS3 DEPER R/F 4
EGCB R/F JWigginton R/F
- See previous concurrences
- DEPER:IE
- DEPER:IE D ER:IE JWigginton DA111 son itBaer 5/ /85 5/ /85 9/3/85
F 7
If you have any questions during your review effort, please call James Wigginton (301-492-4967) or me (301-492-4780).
. Sincerely, Robert L. Baer, Chief Enginnering and Generic Communications Branch Division of Emergency Preparedness and Engineering Response Office of Inspection and Enforcement
Enclosure:
As stated u
DISTRIBUTION R. H. Vollmer, IE E. L. Jordan, IE J. G. Partlow, IE' B. K. Grimes, IE S. A. Schwartz, IE R. L. Baer, IE L. J.'Cunningham, IE D. P. Allison, IE G. Yuhas, RV l
J. Wigginton PDR DCS DEPER R/F EGCB R/F JWigginton R/F i
DEF DEFER:IE DEPER:IE JWh inton DA111 son RBaer 5/2 7/85 5/
85 5/ /85 l
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