ML20137A638
| ML20137A638 | |
| Person / Time | |
|---|---|
| Issue date: | 11/14/1985 |
| From: | Grimsley D NRC OFFICE OF ADMINISTRATION (ADM) |
| To: | Lieberman M ZUCKERT, SCOUTT, RASENBERGER & JOHNSON |
| Shared Package | |
| ML20137A643 | List: |
| References | |
| FOIA-85-651, RTR-REGGD-01.097, RTR-REGGD-1.097 NUDOCS 8511260060 | |
| Download: ML20137A638 (2) | |
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NUCLEAR REGULATORY COMMISSION
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Marvin S. Lieberman, Esquire Law Offices Zuckert, Scoutt, Rasenberger and Johnson Brawner Building 888 Seventeenth Street, NW IN RESPONSE REFER Washington, DC 20006-3959 TO F01A-85-651
Dear Mr. Lieberman:
This is in partial response to your letter dated September 24, 1985, in which you requested, pursuant to the Freedom of Information Act (FOIA), copies of a qualification report for in containment radiation, or a similar document, and any other documents or information submitted by GA Technologies (or General Atomics) concerning instrumentation that can survive LOCA and qualification of equipment, instruments, or other devices under requirements of Reg. Guide 1.97.
Copies of the documents listed on the enclosed Appendix A are being placed in the NRC Public Document Room (PDR) located at 1717 H Street, NW, Washington, DC 20555, for your inspection and copying. The documents will be filed in folder F01A-85-680 in your name.
The NRC has not completed its search for documents subject to your request.
We will respond as soon as that action is completed.
Sincerely, hM $
Donnie H. Grimsley, Director Division of Rules and Records Office of Administration
Enclosure:
As stated h12 60 851114 LIEBERM85-651 PDR
O F01A-85-651 4*.
Ee Appendix A DATE ORIGINATOR
_ RECIPIENT DESCRIPTION 1.
6/26/85 General Atomic Qualification summary for General Atomic high range containment radiation monitoring system model No. RD-23 relative to Baltimore Gas & Electric (131 pgs.)
2.
8/08/83 Re Baer, IE G. Knighton, Vendor Feedback on NUREG-0737 NRR Items (Wide Range Gas Monitor ProblemsatSongs)(2pgs.)
3.
7/22/83 General Atomics J. Wiggington Concerns at San Onofre Nuclear Generating Station Relative to GA Technologies Inc. Wide Range Gas Monitor Systems (3 pgs.)
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AUG 8 1583 MEMORANDUM FOR:
George W. Knighton, Chief Licensing Branch 3 Division of Licensing Office of Nuclear Reactor Regulation FROM:
Robert L. Baer, Chief Engineering and Generic Communications Branch Divison of Emergency Preparedness and Engineering Response Office of Inspection and Enforcement
SUBJECT:
VENDOR FEEDBACK ON NUREG-0737 ITEMS (WIDE RANGE GAS MONITOR PROBLEMS AT SONGS)
The enclosed response from GA Technologies addresses the Region V concerns noted in my May 5,1983 memorandum to you (copy enclosed). We believe the vendor has adequately addressed and resolved the hardware and software related problems identified at SONGS.
We have sent GA's referenced R072 and RD52 calibration reports to Bill Gammill (METB) by seperate mailing.
IE plans no further action on this matter, but would appreciate an update on the containment high-range radiation monitor and post-accident sampling items (technical specification related) noted in my May 5 memo.
T' Robert L. Baer, Chief Engineering and Generic Communications Branch Division of Emergency Preparedness ano Engineering Response, IE
Enclosures:
1.
July 22, 1983 GA Letter 2.
May 5,1983 NRC Baer-Knighton Memorandum cc:
See Page 2 CONTACT: Jim Wigginton, IE 49-24967
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P o box 81608 saw oitco catso=A s2tsa July 22, 1983 re t 9: 4 4 3??0 Mr. Jim Wiggington Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission E W/S 312A Washington, DC 20555
Subject:
Concerns at San Onofre Nuclear Generating Station Rel'ative to GA Technologies Inc. Wide Range Gas Monitor Systems
Dear Mr. Wiggington:
Per our recent telephone conversation, the following comments are offered relative to the subject concerns.
It should be noted that the San Onofre Wide Range Gas Monitors (WRGMs) were shipped in February 1981 and were the first field installation of the GA Technologies WRGM.
GA personnel worked very closely with Southern California Edison and Bechtel personnel at that installation to resolve problems which arose and also to improve the product.
A number of hardware and software design changes were effected as a result of that effort.
All of the concerns which we discussed have been corrected by these design changes and have been or are being implemented in all other installations of the WRGM.
Specific comments to the concerns discussed are as follows:
1.
High Range (RD72-1 and RD72-2) and Low Range (RD52) detectors calibration:
Calibrations performed by Southern California Edison with an NBS traceable source indicated that the GA Monitor was producing a reading that was excessively high and beyond the accuracy range specified by the San Onofre specification (but not beyond the factors required by Reg. Guide 197 Rev. 2).
Upon investigation, GA determined that the gas used for primary calibration by GA had introduced errors which were not detected.
For this reason, new samples of NBS traceable gas was purchased and the primary calibrations were re-performed.
During this recalibration, it was determined that the high range detectors RD72-1 and RD72-2 had unique characteristics which would require a direct calibration of each unit to reach an optimon accuracy figure.
It was also determined that the solid source calibration did characterize the reading obtained directly with a gas sample to a highly accurate degree.
Details of these o m, >-, k 59 84 UJ)(D l O r
conclusions are included in the re-issued calibration reports E-255-961 Rev. 2 (for the RD72) and E-115-647 Rev. 4 (RD52) which are attached to this correspondence.
GA is currently in the process of re-calibrating all detectors in the field to insure an optimum accuracy and all customers of the Wide Range Gas Monitor have been notified of this policy.
The exact schedule for this calibration is being worked out between each of the customers and GA.
2.
So ftware ' Changes :
Several heprovements in the software program in the Microprocessor (RM-80) associated with the Wide Range Gas Monitor were made by GA on the San Onofre Units. The concerns described relative to the appropriate stack area were a problem in the early GA System in that the Microprocessor Controller did not recognize that stacks with different cross-sections could be selected.
PROM units with the new software have been distributed by FC0 033. June 22, 1982.
In addition, changes were made to:
a)
Add programming to suppress noise being induced into the detector electronic circuitry when either pump motor was energized or de-energized.
b)
Correct an error condition in the program used to sense loss of sample flow, c)
Added feature to allow for resetting the output of the mooothing algorithm to more easily establish background.
3 Oscillations of Signal:
The problem referred to is believed to be an Electromagnetic e
Interference (Noise) problem which resulted from insufficient shielding of the CdTe High Range detectors.
This problem has been corrected by changing connections on the OdTe detectors and has been implemented by Field Change Order (FCO) 032. (July 7,1982) 59 4 2
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Wiring Deficiencies:
An RM80 Microprocessor Junction Box was reportedly miswired and rewired by SCE in the field.
Investigation indicate that the wiring either was proper or was brought to a proper state by SCE
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personnel.
In any event, all the related documentation has been reviewed and determined to be correct.
Also, the unit is currently wired to its proper configuration.
GA believes no further action is required for this item.
If there are any further questions concerning these items or any other items relative to GA Technologies Radiation Monitoring Systems, please
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contact the undersigned at (619) 457-8845.
Sincerely,
[N U)$d C J. H. Winso JHW/11a bec:
W. Cocpas D. liit: man D. Nau R. Perkins G. Simmons 6
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