ML20052E292
| ML20052E292 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 04/29/1982 |
| From: | Rhode G NIAGARA MOHAWK POWER CORP. |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| REF-PT21-82 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8205100305 | |
| Download: ML20052E292 (2) | |
Text
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M Y NIAGARA RuMOHAWK NIAGARA MOHAWK POWER CORPORATION /300 ER;E DOULEVARD V.EST. SYRACUSE N Y.13202/ TELEPHONE (315) 4741511 April 29, 1982
\\s-f Office of Inspection and Enforcement
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NCEtypN Region I Afg Attention:
Mr. R. W. Starostecki, Director
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Division of Resident and Project Inspection 3g U. S. Nuclear Regulatory Commission er 631 Park Avenue 4
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Re: Nine Mile Point Unit 2 Docket No. 50-410
Dear Mr. Starostecki:
Enclosed is an interim 30-day report in accordance with 10 CFR 50.55(e) for the potentially reportable deficiency regarding AGASTAT E-7000 series l
time-delay relays. This condition was reported by telephone to Mr. H. Kister, of your staff, on April 7, 1982.
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Very truly yours, NIAGARA MOHAWK OWER CORPORATION iOs
- f ho Vice President System Project Management PM:ja xc: Director of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Mr. R. D. Schulz, Resident Inspector 8205100305 820429 g' g d i
PDR ADOCK 05000410
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o NIAGARA M0 HAWK POWER CORPORATION Nine Mile Point Unit 2 Docket No. 50-410 Interim Report for a Potentially Reportable Deficiency Under 10 CFR 50.55(e)
Regarding AGASTAT E-7000 Series Time-Delay Relays Description of the Deficiency On February ?, 1982, the Control Products Division of Amerace Corporation notified the U.S. Nuclear Regulatory Comission of a deficiency regarding their AGASTAT E-7000 series time-delay relays in accordance with 10 CFR Part
- 21. This problem is also identified in NRC I.E. Information Notice 82-04.
According to the Notice, approximately 20% of these relays manufactured between July 15, 1981 and January 12, 1982 may not operate properly due to a time and temperature based deterioration of the pneumatic timing diaphragm.
This can result in a shorter time delay than indicated on the relay dial.
AGASTAT E-7000 series time-delay relays are specified for the Nine Mile Point Unit 2 design.
Information has been requested from our nuclear steam system supplier and the affected vendors to determine if any of the suspected relays have been received for use at Unit 2.
However, this information is not available at this time. Therefore, a final report will be submitted by July 30, 1982.
,