ML19257C582
| ML19257C582 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 01/14/1980 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Stampley N MISSISSIPPI POWER & LIGHT CO. |
| References | |
| NUDOCS 8001290435 | |
| Download: ML19257C582 (1) | |
Text
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'o, UNITED STATES 8
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( (,g NUCLEAR REGULATORY COMMISSION g'
i, a REGION 11 o, y 8'
101 MARIETTA ST N.W., SUITE 3100
%*****o AT LANTA, G EORG t A 30303 JAN 141980 In Reply Refer To:
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Mississippi Power and Light Company Attn:
N.
L. Stampley Vice President of Production P. O. Box 1640 Jackson, Mississippi 39205 Centlemen:
Enclosed is IE Bulletin No.79-01B which requires action by you with regard to your power reactor facility (ies) with an operating license. to IE Bulletin 79-01B, entitled " Interim Staff Position on Environmental Qualifications of Safety-Related Electrical Equipment",
will be forwarded at a later date.
Should you have questions regarding this Bulletin or the actions required of you, please contact this office.
Sincerely, D h' %, y f\\-
.2 James P. O'Reilly Director
Enclosures:
1.
IE Bulletin No.79-01B with Enclosures 2.
List of Recently Issued IE Bulletins 182)349 8 00129@. eg
JAN 141980 Mississippi Power and Light Company -
cc w/ encl:
C. K. McCoy Plant Manager Post Office Box 756 Port Gibson, Mississippi 39150 18K 350
UNITED STATES SSINS No.:
6820 NUCLEAR REGULATORY COMMISSION Accessions No.:
OFFICE OF INSPECTION AND ENFORCEMENT 7910250528 WASHINGTON, D.C.
20555 January 14, 1980 IE Bulletin No.79-01B ENVIRONMENTAL QUALIFICATION OF CLASS IE EQUIPMENT 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 conditions.
The NRC staff has completed the initial review of licensees' responses to Bulletin No. 79-01.
Based on this review, additional information 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 ENVIRONMENTAL 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.
It 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 enuipment qualifications. Some licensees used the System Analysis Method which proved to be the most effecti approach. This method includes 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
,821 35%
No. of pages:
'z44,