ML19225A364
| ML19225A364 | |
| Person / Time | |
|---|---|
| Site: | FitzPatrick  |
| Issue date: | 06/06/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Leonard J POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK |
| References | |
| NUDOCS 7907190089 | |
| Download: ML19225A364 (1) | |
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UNITED STATES 2
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NUCLEAR REGULATORY COMMISSION
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KING OF PRUSSI A, PENNSY LVANI A 194CG June 6, 1979 Docket No. 50-333 Power Authority of the State of New York James A. FitzPatrick Nuclear Power Plant ATTN:
Mr. J. D. Leonard Resident Manager P. O. Box 41 Lycoming, New York 13093 Gentlemen:
Enclosed is supplement IE Bulletin 79-01 A.
I* requires action by you with regard to power reactor facility (ies) with an operating license except for the 11 SEP (Systemat'c Evaluation Program) plants which are listed in Enclosure 3.
This Bulletin is also being sent for information to the 11 SEP plants and all power reactor facilities with a constructi'.1 permit.
No action or written respe se is required for these two ca'egories of facilities.
Should you have questions regarding this Bulletin or the actions required of you, please contact this office.
Sincerely, C
, Boyce H. Grier Director
Enclosures:
1.
IE Bulletin No. 79-OlA 2.
List o# IE Bulletins Issued in Last Twelve Months 3.
List of SEP Plants (11) cc w/encls:
George T. Berry, Executive Director P. W. Lyon, Manager - Nizulear Operations A. Klausmann, Director, Quality Assurance M. C. Cosgrove, Quality Assurance Supervisor J. F. Davis, Chairman, Safety Review Committee L. R. Bennett, Assistant General Manager - General Counsel G. M. Wilverding, Licensing Supervisor 7907190gg g L. - (,
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ENCLOSURE 1 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C.
20555 IE Bulletin No. 79-OlA Date:
June 6, 1979 Page 1 of 3 SUPPLEMEi.f NO.79-01A TO IE BULLETIN 79 ENVIRONMENTAL QUALIFICATION OF CLASS 1E EQUIPMENT (DEFICIENCIES IN THE ENVIRONMENTAL QUALIFICATION OF ASCO SOLEN 0ID VALVES)
Description of Circumstances:
Recently, a noncompliance report under 10 CFR Part 21 was received by the NRC from the Henry Pratt Company, manufacturer of butterfly valves which are installed in the primary containment at the Three Mile Island Unit 2 Nuclear Station.
These butterfly valves are used for purge and exhaust purposes and are required to operate during accident conditions.
The reprt discusses the use of an unqualified solenoid valve for a safety-related valve function which requires operation under accident conditions.
The solenaid valve in question is Catalogue No. HT-8331A45, manufactured by the Automatic Ewitch Company ( ASCO) of Florham Park, New Jersey.
This pilot valve is used to pilot control the pneumatic valve actuators which are installed on the containmant ventilatio1 butterfly valves at this facility.
The deficiency in these solenoid valves identified in the Part 21 Report corcerns the parts made of acetal plastic material.
The acetal disc holder assembly and bottom plug in the pilot valve assembly are stated by ASCO to have a maximum service limit of 400,000 Rad integrated dosage ad 200 degrees F temperature.
Acccrding to ASCO, exposure of these acetal plastic parts to specified maximum environmental conditions may render the solenoid pilot valve inoperable which would cause the associated butterfly valve to malfunction.
Further investigation at ASCO by the NRC staff has revealed that the valve seals in most ASCO solenoid valves contain Buna 'N" elastomer material, which reportedly has a maximum service limit of 7,000,000 Rad integrated dosage and 180 degrees F temperature.
The investigation further revealed that ASCO has available a line of qualified solenoid operated pilot valves (ASCO Catalogue No. NP-1) which have no plastic parts, utilize othylene propylene or viton elastomers and have a continuously energized operating life of four years, under normal embient conditions up to 140 degrees F.
According to the manufacturer, at the end of this period, the coil, manual operator (optional feature) and all resilient parts must be replaced.
These preventive maintenance instructions are specified in the installation and instruction bulletins Which are provided to the purchaser with each shipment of solenoid valves.
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The final items of concern identified r! DUPLICATE DOCUMENT applicaticn of Class "A", "B", or "F" L
accident environment.
In this regard Entire document previously entered into system under:
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