ML17300B192
| ML17300B192 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 01/28/1988 |
| From: | Meenan W KAMAN INSTRUMENTATION CORP. |
| To: | Baer R NRC |
| References | |
| REF-PT21-88-007-000, RTR-REGGD-01.045 PT21-88-007-000, NUDOCS 8802120258 | |
| Download: ML17300B192 (6) | |
Text
REGULA RY INFORMATION DISTRIBUTIWSYSTEM (RIDS)
DOCKET 05000528 05000529 05000530
SUBJECT:
Provides listed info in response to 870317.ltr re deficiencies in particulate channel of RU-1 radiation monitor. Analysis to determine effect of radionuclides on monitor response complete. Suppor ting info encl.
DISTRIBUTION CODE:
IEi'V COPIES RECEIVED: LTR ENCL SIZE:
TITLE: Part 21 Rept (50 DKT)
ACCESSION NBR:+802120258 DQC. DATE: 88/01/28 NOTARIZED:
NO FACIL:STN-50-528 Palo Verde Nuclear Stationi Unit ii Arizona Publi STN-50-529 Palo Verde Nuclear Stations Unit 2i Arizona Pub li STN-50-530 Palo Verde Nuclear Stationi Unit 3i Arizona Publi AUTH. NAME AUTHOR AFFILIATION MEENANi M.
Kaman Instrumentation Corp.
REC IP. NAME RECIPIENT AFFILIATION BAERi R. L.
Qffice of Nuclear Regulatory Research'irector (Post 86072 NOTES: Standardized plant.
Standard i z ed p lant.
Standardized plant.
05000528 05000529 05000530 RECIPIENT ID CODE/NAME PD5 LA LICITRA>E COPIES LTTR ENCL 0
1 RECIPIENT ID CODE/NAME PD5 PD DAVIS. M COPIES LTTR ENCL 1
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1 INTERNAL: AEOD/DOA ARM TECH ADV NRR VARGAi S NRR/DEST/ADS NRR/DQEA/EAB NRR/D
/DE/EIB RGN2 RGN4 01 1
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AEOD/DSP/TPAB NRR CRUTCHFIELD NRR/DEBT/ADE NRR/DLPG/GAB NRR/DOEA/GCB NRR/PMAS/ILRB RES DEPY GI RGN1 RGN3 RGN5 1
1 1
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EXTERNAL:
INPO RECORD CTR NRC PDR NOTES:
LPDR NSIC SILVERp E 1
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TOTAL NUMBER OF COPIES REQUIRED:
LTTR 29 ENCL 28
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0 Kaman Instrumentation Corporation 1500 Garden of the Gods Rd.
B O. Box 7463, Colorado Springs, CO 80933-7463 (303) 599-1500 L$Qo,QQQog January 28, 1988 United States Nuclear Regulatory Commission Washington, D.C.
20555 Attention:
Mr. Robert L. Baer Engineering 8 Generic Communications Branch
Dear Mr. Baer:
The following is in response to your letter of March 17, 1987, regarding deficiencies in the particulate channel of the RU-1 radiation monitor at the Palo Verde Nuclear Generating Station (PVNGS).
The RU-1 monitor was supplied to PVNGS by Kaman per the requirements of Specification 13-NM-997.
The requirements of NRC Regulatory Guide 1.45 were not imposed by the specification.
The monitor was supplied as a safety related, quality class glE, containment building atmosphere monitor with particulate, iodine, gas, and dew point hygrometer channels.
Apparently, ANPP and/or their
- agent, Bechtel Power Corporation, reviewed the monitor design and were satisfied that it was adequate to satisfy the requirements of the Regulatory Guide.
The documentation supplied with this monitor was not erroneous, but was unclear as to the proper detector efficiency to be used.
This was clarified via a letter from Kaman to ANPP on December 4, 1986.
This documentation (Report of Cali-bration for Palo Verde Baseline Moving Filter Particulate Monitors, Kaman Report No. K83-28 U(R)) will be revised by Kaman to avoid future confusion.
The EPROM supplied by Kaman for this monitor did indeed contain an incorrect flow conversion factor (reference PVNGS EER 86-Sg-113).
This error was corrected by Kaman shortly after it was identified.
As for generic implications of this error, Kaman is not aware of any other utility utilizing Kaman monitors to satisfy the requirements of Regulatory Guide,i 1.45.
- Hence, the reported deficiency is unique to PVNGS.
Kaman has verified the facts of your letter as stated above.
Response
to your specific concerns are as follows:
1.
The RU-1 monitor is unique to PVNGS.
This specific deficiency does not exist in any other facility with Kaman monitors.
Kaman is in the process 8802l20258 880l28 PDR ADOCK 05000528 lII P
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Mr. Robert L. Baer January 28, 1988 of reviewing all software modifications to all customers to determine if the software's ability to perform its design function has been compromised as a result of any modification.
This includes complete testing of those modifications if existing evidence of their testing does not appear adequate.
2.
Should potential problems be encountered, each plant with that particular problem will be notified promptly by telephone and in writing.
The reporting requirements of 10 CFR Part 21 will be followed, if applicable.
3.
To prevent recurrence, Kaman's procedures are being modified to require more extensive testing of software modifications.
Kaman has also completed an analysis to determine the effect of short lived radionuclides on monitor response.
This was accomplished utilizing a software simulation program.
A summary of the results is attached.
These results indicate that the larger the fraction of short lived particulates, the longer it takes the software algorithm in the monitor to stabilize after a filter change and provide an accurate reading of sampled activity.
However, if the sampled activity increases, the algorithm can detect an alarm condition regardless of its overall accuracy.
The results of the simulation program also indicate that the monitor's sensitivity is not greatly affected by a relatively high background reading.
Kaman is unable to comment as to whether or not ANPP is meeting its licensing commitments.
Until late of 1986 we were not aware that this monitor was being used to meet the requirements of Regulatory Guide 1.45, and we pres-ently have no information as to how the monitor is being operated or maintained.
You may contact Mr. Carey Matthews, Customer Services Manager, at (303) 599-1454 or myself at (303) 599-1660, if you desire further information.
Sincerely, William Meenan Project Engineer MM:tt Encl.
cc:
C. Matthews G. Boyle
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