ML19241A694

LER 79-013/01T-0 on 790613:main Steam Relief Valve RV3-2-71L Lifted,Causing Torus Water Vol to Exceed Tech Spec Limit by 2.6%.Reactor Manually Scrammed.Valve Replaced & Sent to Wiley Lab to Determine Cause for Failure

ML19241A694
Person / Time
Site:	Peach Bottom
Issue date:	06/27/1979
From:	Cooney H, Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19241A692	List: ML19241A691 ML19241A694
References
LER-79-013-01T, LER-79-13-1T, NUDOCS 7907090298
Download: ML19241A694 (2)

Text

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Unit 3 LICLNSEE EVEN . REPOill aepurt No. 3-79-13/1T cc,NiHut utocx. I I I I I I I 6 l@ WLL ASL PHINT oH IWL ALL RLOUIRED INFORMAllONJ Vl l 3e9 i A !LICENSEE 7 P T5 CODE lS l3 l @l Ol Ol IOLICENSE 14 lb lOl0lOl0I-lOl0l@l4I1 NUMBEH 25 26 1l1l1 @! j LICENSE TYPE JO 31 J' W l@ CcN'T I"li [[H[e l L !@l0 l 5 l Ol -10I? I7 a l@l 0 l 6l 1 317l9!@l016l2 7!7 9j@ LVLNT DEbCH PTION A OPRo0A C NSL ENCES oi/ l With Unit 3 operating at 95% power, main ateam relief valve RV3-2-71L i ni i ] lifted caucing torus water volume to reach 130, 675 cu ft., 2. G above j o 4 l Tech Spoc limit of 127,300 cu. ft. Reactor cool-down rate reached 11h0p  ; ois l in one hour,1h- above Tech Spec limit of 100 0F per hour. The reactor j toj i was tr.nually acr,med before the torus temperature reached 1100 F in j oi, i acco2 dance with procedure and =ax cool-down rate was below the design j a a! i limit, therefore the consequences were minimal, 7 a 9 W S Y"TE M CAUSE CAUSE COMP. VALVE CODE COOE SUUCODE COMPONENT COOE SUSCODE SUBCODE o u lC lC @ W@ l 3 l @ l V I A l L l V I E l X l@ [P_j @ [3_j 20 J d 9 10 11 12 13 IW 19

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