ML19257C562
| ML19257C562 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 01/14/1980 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Groce R VERMONT YANKEE NUCLEAR POWER CORP. |
| References | |
| NUDOCS 8001290401 | |
| Download: ML19257C562 (45) | |
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631 PARK AVENUE 9,e KING OF PRUSSIA, PENNSYLVANIA 19406 Docket No. 50-271 UAN 14 1980 Vermont Yankee Nuclear Power Corporation ATTN:
Mr. Robert H. Groce Licensing Engineer 20 Turnpike Road Westborough, Massachusetts 01581 Gentlemen:
Enclosed is IE Bulletin 79-018 which requires action by you with regard to your power reactor facility with an operating license.
Should you have questions regarding this Bulletin or the actions required of you, please contact this office.
Sincerely, n
Boyce H. Grier
~ Director
Enclosures:
1.
IE Bulletin No. 79-018 with Attachments 2.
List of Recently Issued IE Bulletins CONTACT:
S. D. Ebneter (215-337-5296) cc w/encls:
W. F. Conway, Plant Superintendent Ms. J. Abbey, Technical Secretary
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ENCLOSURE 1 UNITED STATES SSINS No.: 6820 NUCLEAR REGULATORY COMMISSION Accessions No.:
0FFICE OF INSPECTION AND ENFORCEMENT 7910250528 WASHINGTON, D.C.
20555 IE Bulletin No.79-01B Date: January 14, 1980 Page 1 of 4 ENVIRONMENTAL QUALIFICATION OF CLASS IE EQUIPMENT Description of Circumstances:
IE Bulletin No. 79-01 required the licensee to perform a detailed review of t% environmental qualification of Class IE electrical equipment to ensure t',1at the equipment will function under (i.e. during and following) postulated accident conditions.
The NRC staff has completed the initial review of licensees' responses to Bulletin No. 79-01.
Based on this review, additional information is neaded to facilitate completion of the NRC evaluation of the adequacy of environmental qualification of Class IE electrical equipment in the operating facilities.
In addition to requet:ing more detailed information, the scope of this Bulletin is expanded to resolve safety concerns relating to design basis environments and current qualification criteria not addressed in the facilities' FSARS.
These include high energy line breaks (HELB) inside and outside primary contain-ment, aging, and submergence.
-, " GUIDELINES FOR EVALUATING ENVIRONMENTAL QUALIFICATION OF CLASS IE ELECTRICAL EQUIPMENT IN OPL'ATING REACTORS", provides the guidelines and criteria the staff will use in evaluating the adequacy of the licensee's Class IE equipment evaluation in respc.1se to this Bulletin.
In general, the reporting problems encountered in the original responses and the additional information needed can be grouped into the following areas:
1.
All Class IE electrical equipment required to function under the postulated accident conditions, both inside and outside primary containment, was not included in the responses.
2.
In many cases, the specific information requested by the Bulletin for each component of Class IE equipment was not reported.
3.
Different methods and/or formats were used in providing the written evidence of Class IE electrical equipment qualifications.
Some licensees 2 sed the System Analysis Method which roved to b approach.
This method includes t a.
Identification of the protec DUPLICATE DOCUMENT under postulated accident co conditions are defined as th Entire document previously from both LOCA and/or HELB i entered into system under:
outside the primary containm ANO t
No. cf pages:
4 182y 86 2