ML19257C862
| ML19257C862 | |
| Person / Time | |
|---|---|
| Site: | Humboldt Bay |
| Issue date: | 01/15/1980 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Crane P PACIFIC GAS & ELECTRIC CO. |
| References | |
| NUDOCS 8001300624 | |
| Download: ML19257C862 (45) | |
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UNITED STATES y y),( ' g NUCLEAR REGULATORY COMMISSION
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1990 N. CALIFORNIA BOULEVARD
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o SUITE 202, WALNUT CREEK PLAZA
- ,,,a WALNUT CREEK, CALIFORNIA 94596 JAN 15 SEO Docket No. 50-133 Pacific Gas and Electric Company 77 Beale Street San Francisco, California 94106 Attention: Mr. Philip A. Crane, Jr.
Assistant General Counsel 7
Gentle aen:
Enclosed is IE Bulletin No.79-01B 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, O
dSn R. H. Engelken Director
Enclosures:
1.
IE Bulletin No.79-01B with Enclosures 2.
List of Recently Issued IE Bulletins cc w/o enclosures:
W. Barr, PG&E W. Raymond, PG&E E. Weeks, PG&E, Humboldt Bay 1833 233 9
n 9
UNITED STATES SSINS No.:
6820 NUCLEAR REGULATORY C0?NISSION Accessions !!o.:
OFFICE OF INSPECTION AND ENFORCEMEilT 7910250528 WASHINGTON, D.C.
20555 January 14, 1980 IE Bulletin No.79-01B ENVIRONMENTAL < QUALIFICATION OF CLASS IE EQUIPMENT w.
Description of Circumstances:
IE Bulletin No. 79-01 required the licensee to perform a detailed review of the environmental qualification of Class IE electrical equipment to ensure that the equipment will function under (i.e. during and following) postulated accident condi tions.
The tiRC staff has completed the initial review of licensees' responses to Bulletin No. 79-01.
Based on this review, addiMonal infomation is needed 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 requesting 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 containment, aging, and submergence., " GUIDELINES FOR EVALUATING ENVIROINENTAL QUALIFICATION OF CLASS IE ELECTRICAL EQUIPMENT IN OPERATING REACTORS", provides the guidelines and criteria the staff will use in evaluating the adequacy of the licensee's Class IE equipment evaluation in response 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 contain-ment, 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 used the System Analysis Method which proved to be the most effective approach. This method includes the following information:
a.
Identification of the prot under postulated accident DUPLICATE DOCUMENT conditions are defined as from both LOCA and/or HEL3 Entire document previously outside the primary contai entered into system under:
ANO7 W5 GM No. of pages:
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