ML19290C133
| ML19290C133 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 12/13/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Pilant J NEBRASKA PUBLIC POWER DISTRICT |
| References | |
| NUDOCS 8001100062 | |
| Download: ML19290C133 (1) | |
Text
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UNITED STATES CENTRAL FILES
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o NUCLEAR REGULATQRY COMMISSION PDR:HQ REGloN IV LPDR I
o 611 RY AN PLAZA DHIVE, SulTE 1000
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December 13, 1979 Docket No.
50-298 Nebraska Public Power District ATIN:
J. M. Pilant, Director Licensing & Quality Assurance Post Office Box 499 Colu= bus, Nebraska G8601
. Gentlemen:
This IE Information Notice is provided as an early notification of a possibly significant matter.
It is expected that recipients will review the information -
for possible applicability to their facilities.
No specific action or response is requested at this tisc.
If further NRC evaluations so indicate, an IE Circular or Bulletin will be issued to recor= send or request specific licensee actions.
If you have questions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
Sincerely, 4
r1 V. Seyfr Director
Enclosures:
1.
IE Information Notice No. 79-31 2.
List of IE Information Notices Recently Issued cc:
L. C. Lessor,,St}perintendent Cooper Nuclear Station Post Office Box 98 Brownville, Nebraska 68321 t
.=
9 8001100 DQ
SSINS: 6870 Accession No.:
UNITED STATES 7910250507 NUCLEAR REGULATORY COMMISSION a
7 D
.gg OFFICE OF INSPECTION AND ENFORCEMENT u
WASHINGTON, D.C.
20555 2d oo IE Information Notice No. 79-31 Date:
December 13, 1979 Page 1 of 1 USE OF INCORRECT AMPLIFIED RESPONSE SPECTRA (ARS)
Description of Circumstances:
Recently, the NRC was informed that, during a review of valve weights in conjunction with the as-built review for IE Bulletin 79-14 at North Anna Unit 1, it was discovered that incorrect amplified response spectra (ARS) had been used as input to the analyses of some piping on both Units 1 and 2.
The reanalyses are being performed by Stone & Webster (S&W), the Architect Engineer for the Virginia Electric & Power Company's facilities.
Similarly, Public Service Company of New Hampshire informed the NRC that the wrong ARS were used for the design of some containment supports at their Seabrook units.
The Architect Engineer for these plants is United Engineers & Constructors (UE&C).
The NRC is currently pursuing this issue in detail with S&W and UE&C to determine the extent of the problem and the generic implications for other facilities.
This Information Notice is provided as an early notification of a possible significant matter.
It is expected that recipients will review the informa-tion for possible applicability to their facilities.
Specific action has been requested by IE Bulletin 79-14.
This bulletin requires that input to seismic analyses of piping, which includes the use of the correct ARS, be verified against the as-built condition of the plant. No specific actions are requested in response to this Information Notice.
If NRC evaluations so indicate, further licensee actions may be requested or required.
If you have any ques-tions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
No written response to this IE Information Notice is required.
IE Information Notice No. 79-31 December 13, 1979 LISTING OF RECENTLY ISSUED IE INFORMATION NOTICES Info rmation Subject Date Issued To Notice No.
Issued 79-26 Breach of Containment 11/5/79 All power reactor Integrity holding Operating License (OL) and Construction Permits (cps)79-12A Attempted Damage to New 11/9/79 All Fuel Facilities, Fuel Assemblies research reactors, and power reactors with an Operating License (OL) or Construction Permit (CP) 79-27 Steam Generator Tube 11/16/79 All power reactor facilities Ruptures at Two PWR holding Operating Licenses Facilities (OLs) and Construction Permits (cps) 79-28 Overloading of Structural 11/16/79 All power reactor facilities Elements Due to Pipe Support with an Operating License (OL) or Construction Petmit (CP) 79-29 Loss of NonSafety-Related 11/16/79 All power reactor facilities Reactor Coolant System holding Operating Licenses Instrumentation During (OLs) or Construction Operating Permits (cps) 79-30 Reporting of Defects and 12/6/79 All power reactor Noncompliances, 10 CFR facilities holding Part 21 Operating Licenses (OLs) and Construction Parmits (cps) and vendors inspected by LCVIP Enclosure 0
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