ML19254F675
| ML19254F675 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 11/05/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Koester G KANSAS GAS & ELECTRIC CO. |
| References | |
| NUDOCS 7911160250 | |
| Download: ML19254F675 (1) | |
Text
{{#Wiki_filter:i C ,,[#irag%, UNITED STATES NUCLEAR REGULATORY COMMISSION O ' *. A REGloN IV I _ f. f]htf)r 5 g ' [l, f, j j o 611 RY AN PL AZA DRIVE SulTE 1000 g, AFillNGToN, TEX AS 76012 c:, Ae a d' g '.'.e '~ + November 5, 1979 In Reply Refer To: RIV Docket No. STN 50-482/IE Information Notice No. 79-26 Kansas Gas & Electric Co. Attn: hk. Glenn L. Koester Vice President-Operations Post Office Box 208 Wichita, Kansas 67201 Centlemen: This IE Information Notice is provided as an early notification of c 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 time. If further NRC evaluations so indicate, an IE Circular, IE Bulletin, or NRR Generic Letter will be issued to recocraend or request specific licensee actions. If you have questions regarding the matter, please contact the Director of the appropriate NRC Regional Office. Sincerely, If/f f Karl V. Seyfri Director
Enclosures:
1. IE Information Notice No. 79-26 2. List of IE Information Notices Issued in the Last Six Months cc: w/ enclosures Messrs. Nicholas A. Petrick, SNUPPS D. T. McPhee, Kansas City Power and Light Company Gerald Charnoff, Shaw, Pittman, Potts 6 Trowbridge E. W. Creel, Kansas Gas and Electric Company 1347 325 mw 7911160 c o
I h , hT R.g %g h' SSINS: 6870 0 Accession No: D \\y 7908220133 ISITED STATES L/. ' UEGULATORY C0!!:llSSION OFr O! 1"SPECT10N AND ENFORCEllENT WA5111NGTON, D. C. 20555 IE Informat. ion Notice No. 79-26 Date: November 5, 1979 Page 1 of 2 IIREACH OF COSTAINMENT INTEGRITY Description of Circu istances: On Sept e::,ber 14, 1979, the Consumers Power Company (CPC) notified the NRC of discovery at the Paliuades Nuclear Generating Plant of a valve uisalignment thaC had resulted in containment integrity being bre;tched for an indeterminate length of time. While preparing to perform a Type "C" leak test between two manual valves in a 3" bypass 1ine around the main 48" containment purgi valve, plant personnel dis-covered that V manual isolation valves vere locked in t.he open posi-tion. The:. nl na._ been locked closed. Investigation by the licensee indicat ed t hat . oawc been imp roperl y posi t.i oned si nce April, 1978, in. when an elficiency te, of the bypass line Iilters was performed. The plant has operated at power f or the r,ijor portion of t hat t ime period. The valve misalignment had no actual impact on t he public heal t h. Iloweve r, in the event of a design basis accident wherein fuel damage and release of pri: nary coolant inside the containment. are postulated, the open valves would provide a significant. path for a radioactive release from the containment. The initial design purpose for the bypass system was to provide a long-term basis accident.-{ capability for the contairncent atmosphere hydrogen contro following a design It was intended that a f ter approximately 30 days following an accident, when containment pressure and activity levels dropped sufficient.ly to permit venting, this system would be manually valved to vent the contairunent atmosphere, through high efficiency and charcoal filters, to the exhaust stack Thus the components in the bypass line beyond the two manual isolation valves were not designed for the severe service they would be exposed to with the valves open during the initial pressure surge of the design basis accident, and signir-icant uncontrolled release would result. High radiation in the vicinity of the bypass line would also make immediate closino af tha 3~ ~- even if identified as the source of Ic DUPLICATE DOCUMENT [/ Current NRC requirements call for Entire document previously control hydrogen buildup. Palisa entered into system under: ANO a No. of pages: f}}