ML19254C980
| ML19254C980 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 10/01/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Goodwin C PORTLAND GENERAL ELECTRIC CO. |
| References | |
| NUDOCS 7910190217 | |
| Download: ML19254C980 (1) | |
Text
pa arco UNITED STATES
. g '%
e 8Y
't NUCLEAR REGULATORY COMMISSION p
y))(c $
fj
','hh REGION V f
1930 N. CALIFORNIA BOULEVARD o, '
- 0
%.i SUITE 202, WALNUT CREEK PLAZA 4
WALNUT CREEK, CALIFORNI A 94596 October 1,1979 Docket No. 50-344 Portland General Elect'ic Company 121 S. W. Salmon Street Portland, Oregon 97204 Attention: Mr. Charles Goodwin, Jr.
Assistant Vice President Gentlemen:
The enclosed Information tiotice provides information with regard to an analysis that identifies an event that could result in overpressurization of containment at a pressurized ater :-. actor.
Sincerely,
[7i%, c( L ~~-
R. H. Engelken Director
Enclosures:
1.
Information riotice 79-24 2.
List of IE Information flotices Issued in the Last Six Months cc w/ enclosures:
C. P. (undt, PGE F. C. Gaidos, PGE 118%
021 219 7010190 x
.I l
SSItiS :
6870 Accession tio:
7908220123 U:1ITED STATES
[]
M[l3 0, q J
fiUCLEAR REGULATORY COMMISSI0il U'
i e U C:.
6 OFFICE OF If;SPECTIO!1 A;D ErlFORCEMEllT t
WASHIriGT0:1, D. C.
20555 October 1, 19 h IE Information tiotice flo. 79-24 OVERPRESSURIZATIOt10F C0:lTAINMEfiT OF A PWR PLAT 1T AFTER A MAlli STEAM LIftE BREAK Virginia Electric and Power Co. submitted a report dated September 7,1979 that identified a deficiency in the original analyses of containment pressurf 'l :on as a result of a steam line break for tiorth Anna Power Station, Units 3 and 4.
Stone and Webster Engineering Corporation performed a reanalyses of containment.
pressure following a main steam line break and determir.ed that, if the auxiliary feedwater system continued to supply feedwater at runout condition-to the ; team generator that had experienced the steam line break, containment design pressure would be exceeded in approximately 10 minutes.
The long term blowdown of the water supplied under runcut corditions by the auxiliary feadwater system had not been considered in the earlier analyses.
The corrective action is now under review by the owner, architect engineer, and f1SSS supplier.
This Information tiotice is proiided as an early notification of a possibly significant matter that is still under review by the flRC staff.
It is expected that recipients will review the information for possible applicability to their facilities.
fio specific actior or response is requested at this tirre.
If tiRC evaluations so indicate, further licensee actions may be requested or required.
fio written response to this Information tiotice is required.
If you have any questions regarding this matter please contact the Director of the appropriate TIRC Regional Office.
1181 022
IE Information Notice No. 79-24 Enclosure October 1,1979 Page 1 of 2 3
LISTING OF IE INFORMATION NOTICES ISSUED IN LAST SIX MONTHS Information Subject Date Issued To Notice No.
Issued 79-10 Nonconforming Pipe 4/16/79 All power reactor Support Struts facilities with a CP 79-11 Lower Reactor Vessel Head 5/7/79 All holders of Reactor Insulation Support Problem OLs and cps 79-12 Attempted Damage to New 5/11/79 All Fuel Facilities Fuel Assemblies Research Reactors, and Power Reactors with an OL or CP 79-13 Indication of Low Water 5/29/79 All Holders of Reactor Level in the Oyster Creek OLs and cps Reactor 79-14 NRC Position of Electrical 6/11/79 All Power Reactor Cable Support Systems Facilities with a CP 79-15 Deficient Procedures 6/7/79 All Holders of Reactor OLs and cps 79-16 Nuclear Incident at Three 6/22/79 All Research React rs Mile Island and Test Reactors with OLs 79-17 Source Holder Assembly Damage 6/20/79 All Holders of Reactor Damage From Misfit Batween OLs and cps Assembly and Reactor Upper Grid Plate 79-18 Skylab Reentry 7/5/79 All Holcers of Reactor OLs 79-19 Pipe Cracks In Stagnant 7/17/79 All Holders of Reactor Borated Water Systems At OLs and cps PWR Plants 1186(
023
IE Information Notice No. 79-24 Enclosure October 1, 1979 Page 2 of 2 LISTING OF IE IfiFORMATION NOTICES ISSUED IN 1979 Information Subject Date Issued To Notice No.
Issued 79-20 NRC Enforcement Policy 8/10/79 All Holders of Reactor NRC Licensed Individuals OLs and cps and Production Licensees with Licensed operators 79-21 Transportation and Commercial 9/7/79 All power and research Burial of Padioactive Material reactors with OL's 79-22 Qualification of Control 9/14/79 All power reactor Systems facilities with operating licenses and construction permits.
79-23 Emergency Diesel Generator 9/26/79 All Power facilities Lube Oil Coolers holding OLs and cps 1187 024