ML19296B947

LER 80-001/03L-0:on 800108,while Performing Relief Valve Setpoint Check,Reactor Vessel 1105A Actuated at 1,600 Psig & Reactor Vessel 1105B Actuated at 1,500 Psig.Possibly Caused by Setpoint Drift.Valves Will Be Repaired

ML19296B947
Person / Time
Site:	Quad Cities
Issue date:	02/07/1980
From:	Vahrenwald J COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19296B938	List: ML19296B937 ML19296B947
References
80-001-03L, 80-1-3L, NUDOCS 8002220404
Download: ML19296B947 (1)

Text

NRC FOPM 366 U.S. NUCLEAR REGULATORY COMMISSION (7 77) ~

LICENSEE EVENT REPORT CONTROL BLOCK: l I

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lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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l A lCODE D l 2 l@l015 l0 l 0 l - l 0 14 l 0 l 0 l - l 0 l 0 l 025 l@l LICENSE NUMSER 26 4 lLICENSE 1 l I TYPEl1l1l@lJ0 l l@

5 7 CAT 58 CON'T O i g,

" C] l 60 L @! ')61 l 51 0lDOCKET 0 l 0NUM8ER l 2 l 6 l 568l@l69 0 l 1 l 0 l 8 l 8 l 0 l@l 0REPORT 74 75 210 DATE l7 l8 l080l@

7 8 EVENT DATE EVENT DESCRIPTION AND PROBAJLE CONSEQUENCES h

[OTTl While performing SBLC Relief Valve Setpoint Check, procedure QOS 1100-4, Relief f0TTlI valve RV 1105A actuated at 1600 psig and relief. valve RV 1105B actuated at 1500 psig. l 0 4 The Technical Specification 4.4.A.2 limits for SBLC relief valves is 1400-1490 psig. l gl The increased setpoints of the relief valves were still within the design pressure g 101s 1 l rating of the SBLC piping. Subsequently the SBLC system was operable and would have l performed had the need arose. l (O l 7 l l 0 s i I 80 7 8 9 E C00 SUSCO E COMPONENT CODE Sub OD'E SU E E

7 8 9 lSlH h {h l Bl@ lV l A lL lV E lX l@ W@ W @

10 11 12 f3 18 19 20 SEQUENTIAL OCCUR RE NCE REPORT REVISION EVENT YE AR REPORT NO. CODE TYPE NO.

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31 l 0l 32 N A O O PL NT MET HOURS 22 S8 IT POR 8. SUPPLI MA UFACTURER l33x [gl34B l g l5 Z lg l0l0l0l l lN g Ylg N[g lC l 7l ll 5lg 3 [36Zl@ 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h The apparent cause of this occurrance is setpoint drif t. Unit Two is presently i OI l i i l shut dOwn for refueling and the valves will be repaired or replaced, and satisfactorily m tested before starting up. A supplemental report will be issued when all l corrective actions have been completed. l l

i 4 I i 7 8 9 80 ST  % POWER ' OTHE R STATUS IS O P DISCOVERY DESCRIPTION W lHlh l0l0l0lhl NA l W @l Survei11ance Test l ACTIVITY CONTENT RELEASED OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RE 8 l.,Ll6.J [_Z,,j h l Zl@l NA l l NA l 7 6 3 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER i 7 l 0 l 0 l O lhlZlTYPE @l DESCRIPTION NA l PERSONNE L INJURIES NUMBER DESCRIPTION NA 7

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LOSS OF OR DAMAGE TO FACIL TY TYPE DESCRIPTION W l Zlgl NA 80 % 220 #6Y- l 7 8 9 10 80 ISSUE Lus I I N hl DESCRIPTION NA l lllllllllllll1 7 8 9 10 68 69 W. :ll NAME OF PREPARER PHONE: