ML19254C976
| ML19254C976 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 10/01/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Koester G KANSAS GAS & ELECTRIC CO. |
| References | |
| NUDOCS 7910190206 | |
| Download: ML19254C976 (1) | |
Text
JG UNITED STATES
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NUCLEAR REGULATORY COMMISSION OA t <* $
REGION IV h!
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'9 October 1, 1979 In Reply Refer To:
RIV Docket No.
STN 50-4d2/IE Information Notice No. 79-24 Kansas Gat. 6 Electric Co.
Attn:
Mr. Glenn L. Koester Vice President-Operations Post Office Bt 208 Wichita, Kans.
67201 Gentlemen:
The enclosed IE Information Notice provides information with regard to an analysis that identifies an event that could result in overpressu-rization of containment at a prcssurized water reactor.
Sincerely,,-
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Karl'V.Seybit',
Director
Enclosures:
1.
List of IE Information Notices Iss.ad in the Last Six Months cc: w/ enclosures Messrs. Sicholas.. Petrick, S::UPPS D. T. McPhee, Kansas City Power and Light Company Gerald Charnoff, Shaw, Pittman, Potts & Trowbridge E. W. Creel, Kansas Gas and Electric Company
! b-009 z' o G 7910100
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SSINS: 6870 Accession No:
7908220123 UNITED STATES NUCLEAR REGULATORY COMMISSION
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'] j]!p[ d y OFFICE OF INSPECTION AND ENFORCEMENT
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WASHINGTON, D. C.
20555 IE Information Notice No. 79-24 Date:
October 1, 1979 Page 1 of 1 OVERPRESSURIZATION OF CONTAINMENT OF A PWR PLANT AFTER A MAIN STEAM LINE BREAK Virginia Electric and Power Co. submitted a report dated September 7, 1979, that identified a deficiency in the original analysis of containment pressurization as a result of a steam line break for North Anna Power Station, Units 3 and 4.
Stone and Webster Engineering Corporation performed a reanalysis of containment pressure following a main steam line break and determined that, if the auxiliary feedwater sys*em continued to supply feedwater at runout conditions to the steam 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 runout conditions by the auxiliary feedwater system had not been considered in the earlier analysis. The corrective action is now under review by the owner, architect engineer, and NSSS supplier.
This IE Information Notice is provided as an early notification of a possibly significant natter tlat is still under review by the NRC staff.
It is expected that recipients will review the information for possible applicability to their f a cili tie.a.
No specific action o response is requested at this time.
If NRC evaluations so indicate, further licensee actions may be quested or required.
No written response to this Information Notice is requirco.
If you have any questions regarding this matter please contact the Director of the appropriate NRC Regional Office.
1i81 010
IE Information Notice No. 79-24 October 1, 1979 LISTING OF IE INFORMATION NOTICES ISSUED IN 1979 Information Subject Date Issued To Notice No.
Issued 79-10 Nonconforming Pipe 4/16/79 All power reactor Support Struts facilities with a Construction Permit (CP) 79-11 Lower Reactor Vessel Head 5/7/79 All Holders of Reactor Insulation Support Problem Operating Licenses (0Ls)
Construction Permits (cps) 79-12 Attempted Damage to New 5/11/79 All fuel facilities, Fuel Assemblies research reactors, and power reactors with an Operating Licensee (OL) or a Construction Permit (CP) 79-13 Indication of Low Water 5/29/79 All Holders of Operating Level in the Oyster Creek License (0L) or Reactor Construction Permit (CP) 79-14 NRC Position of Electrical 6/11/79 All Power Reactor Cable Support Systems facilities with a Construction Permit (CP) and aoplicants 79-15 Deficient Procedures 6/7/79 All Holders of Reactor Operating Licenses (OLs) and Construction Permits (cps) 79-16 Nuclear Incident at Three 6/22/79 All Research Reactors Mile Island and Test Reactors with Operating Licenses (0Ls) 79-17 Source Holder Assembly 6/20/79 All Holders of Reactor Damage From Misfit Between Operating Licenses (OLs)
Assembly and Reactor Upper and Construction Grid Plate Permits (cps)
Enclosure Page 1 of 2 11847 011
IE Information Notice No. 79-24 October 1, 1979 79-18 Skylab Reentry 7/5/79 All holders of Reactor Operating Licenses (OLs) 79-19 Pipe Cracks in Stagnant 7/17/79 All Holders of Reactor Borated Water Systems at Operating Licenses (OLs)
PWR Plants and Construction Permits (cps) 79-20 NRC Enforcement Policy 8/14/79 All Holders of Reactor NRC Lir nsed Individuals Operating Licenses (OLs) and Construction Permits (cps), Research Reactors, Test Reactors Licensees with Licensed Operators 79-21 Transportation and 9/7/79 All power and research Commerical Burial reactors with Operating of Radioactive Material License (OL) 79-22 Qualification of Control 9/14/79 All power reactor Systems facilities with an Operating Licenses (OL) and Construction Permits (CP) 79-23 Emergency Diesel Generator 9/26/79 All power reactor Lube Oil Coolers facilities with an Operating License (0L) or Construction Permit (CP)
Enclosure Page 2 of 2 i184? Oi2