ML19294A440

LER#78-034/03L-0 on 781023: in Mode 3 at 500F,12 Main Steam Safety Valve Relief Set Points Were Outside Tolerances of TS 4.7.1;all Were Adjusted & Setpoints Returned to Spec

ML19294A440
Person / Time
Site:	Calvert Cliffs
Issue date:	11/02/1978
From:	Davis S, Miernicki M BALTIMORE GAS & ELECTRIC CO.
To:
Shared Package
ML19294A438	List: ML19294A437 ML19294A440
References
LER-78-034-03L, LER-78-34-3L, NUDOCS 7811130214
Download: ML19294A440 (1)

Text

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P. F ORM 366 U.S NUCLEAR REGULATORY COMMISSION 17 77)

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68 69 EVENT DATE 74 75 REPORT DATE 80 7 8 60 61 DOCKET NUMB E R EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h i

l o 121 LAt 0715. vith the reactor c] ant in Mode 3 at nonrox. 500 F the main o la L steam safety valve relief setpoints were checked per T.S. h.7.1.1. I 10141 LTwelve of the sixteen safety valves were fcund to be outside the toler- l 10151 Lanees allov*d by table h 71- All these valves vere sjusted and their [

l o ls l l setpoints returned to spec. by 1000. LER 78-17 (U-1) describes a f I

l o l 7 ) l similar event.

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i oj l Statistical testing by Dresser on accuracy of Hydroset method of settine l li li j [ relief valves resulted in a revised graph to be used when settine Msxi-l3 l7, l flow Main Steam Safety Valves Tyre 3707R. Change was incorporated 4

lil3[ l into relief valve setting procedure and consequently 12 valves were l

[i gg l found out of tolerance. No further corrective action is necessary. I 7 8 9 80 STA S  % POWER OTHER STATUS O SCO RY DISCOVERY DESCRIPTION i s W @ lQlCl0l@l N/A l W @l Surveillance Test l ACTIVITY CONTENT RELE ASEO OF RELE ASE AVOUNT OF ACTIVITY LOCATION CF RELEASE li is 8I 9[zj @ [JJ@l N/A 7 10 11

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