ML20126L144
| ML20126L144 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 05/20/1981 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| RO-2-81-32-1P, RO-81-002, RO-81-2, NUDOCS 8106010307 | |
| Download: ML20126L144 (3) | |
Text
{{#Wiki_filter:. 1 p-nyct* LC 4 PHILADELPHIA ELECTRIC" COMPANY Peach Bottom Atomic Power Station. Delta, Pennsylvania 17314 -l ;Jin g 2 0 e M 8 L L'u 4.y g,..q 3 s . h..,~,. $ 5* s, -a e. - Mr. Boyce N. Orier, .c. Offitte 'of Inspection, and Enforcement; ~ i W;;. Dngion % United States Huclear Reguiatory Commi? sion i't-O" n i; o P.rus PA 194'06' 4 ~: ' REPORTABLE. OCCURRENCE - PROMPT NOTIFICATION ~
SUBJECT:
I '. Confirming R. S. Fleischmann's conversation with Mr..C. .Cowgiill,6n and Enforcement ~on May' Region 1, Nuclear Regulatory Commi' alon, Office o s Inapect1 20,.1961. I
Reference:
Docket No. " 50-277 a 50-a78 ~ ' ~ Peach 30ttom Units 2 and 3 Technical Specification Refeience: 6.9.2in.(3) 2a61-32/IP t.. ,9 " Report No.: i. .O.ccurrence.. Date: 5/20/31 5 i Idsntificati'on of Occurrence: s R$ evaluation of concrete block walls identified four walls which were unstable urider the effects of tornado depressurization and cardox injection. Canditions Prior g Ocentrence: Unit $ s. hut down.. for an. unrelated forced outage.. Unit'3 shut down for a refueling outage. App.ah nt cause of occurrenee m !r ~ construction-or design error. O,, f? b-L h m- ,l0% N I' * ' .n c uit;y.,,198 t h C. h %6-N, N fd $ ns, ;7 f ,t s w w r .g. 3 .e. V j g.'. t ~
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M4', Boyce H. Orior Page 2 \\ Analysis of, Occurrence:- During the re-evaluation. of concrete block walls in response to IE Bulletin 60 11, four walls, identified as walls 6d.1 to 68.4, were found to be unstable under the effects of tornado l d gressurisation and cardox injection. These are the computer room walls in the cable spreading room. Collapse of the walls could affect safety-related cables which pass through or are in cloce proximity to the walls. 05Frective Actiont-Until a permanent ~ modification. i's completed, the computer room doors will be-blocked open..approximately 3 inches. ':'his opening will prevent wall failure,due to either tornado depressur12ation-or cardox injeotion. The permanent' design modification requires insta11'ation. of vente cbove the computer room doors with ducts added to raise the vent opening to the t'op of 1Fhe computer room. This elevat'ed vent',- cponing is required to maintain,. air conditioning and cardox levols in the computer room. Previous-Cecurrences Xene. t Very truly yours,. 1d, T. Ullrich Station Superintendent.. Peach Bottom Atomic Power Station \\. l i t l l
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