Information Notice 1979-31, Use of Incorrect Amplified Response Spectra
| ML031180198 | |
| Person / Time | |
|---|---|
| Site: | 05000000 |
| Issue date: | 12/13/1979 |
| From: | NRC/OI |
| To: | |
| References | |
| IN-79-031, NUDOCS 7910250507 | |
| Download: ML031180198 (2) | |
SSINS: 6870
Accession No.:
UNITED STATES
7910250507
NUCLEAR REGULATORY COMMISSION
OFFICE OF INSPECTION AND ENFORCEMENT
WASHINGTON, D.C.
20555
December 13, 1979
IE Information Notice No. 79-31 USE OF INCORRECT AMPLIFIED RESPONSE SPECTRA (ARS)
Description of Circumstances
Recently, the NRC was informed that, durinq 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 Virqinia 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.
Enclosure:
List of IE Information
Notices Recently Issued
IE Information Notice No. 79-31
December 13, 1979
RECENTLY ISSUED
IE INFORMATION NOTICES
Enclosure
Information
Notice No.
79-30
79-29
79-28
79-27
79-12A
79-26
79-25
79-24
79-23
79-22 Subject
Date
Issued
Renortinq of Defects and
Noncompliances, 10 CFR
Part 21 Loss of NonSafety-Related
Reactor Coolant System
Instrumentation Curing
Operation
Overloadina of Structural
Elements Due to Pipe Support
Loads
Steam Generator Tube
Ruptures At Two PWIR
Facilities
Attempted Damage To flew
Fuel.Assemblies
Breach of Containment
Inteqrity
Reactor Trips At Turkey
Point Units 3 And 4
Overpressurization Of
Containment Of A PWR Plant
After A Main Steam Line
Break
Emergency Diesel Generator
Lube Oil Coolers
Oualification of Control
Systems
Transportation and Commercial
Burial of Radioactive Material
12/6/79 Issued To
All power reactor facilities
vendors inspected by LCVIP
11/16/79
All power reactor facilities
holdinc
11/16/79
All power reactor facilities
11/16/79
All power reactor facilities
11/9/79 All Fuel Facilities, research reactors, and
power reactors with an
1/5/79
0/1/79
All power reactor facilities
All power facilities with
.0/1/79
All power reactor facilities
with a CP
9/26/79
?/14/79
9/7/79
All power reactor
facilities holding OLs
and CPs
All Power reactor
facilities with
operating licenses
and construction permits.
All power and research
reactors with OLs
79-21