ML19323G994

LER 80-026/01T-0:on 800520,while in Hot Standby,Realignment of Condensate Storage Tank Header Supply Valves Resulted in Isolation of Water Supply to Auxiliary Feedwater Pumps. Caused by Error of Transposed Valve Numbers in Log

ML19323G994
Person / Time
Site:	Calvert Cliffs
Issue date:	06/03/1980
From:	Denton R BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19323G993	List: ML19323G992 ML19323G994
References
LER-80-026-01T, LER-80-26-1T, NUDOCS 8006090368
Download: ML19323G994 (3)

Text

{{#Wiki_filter:W776 O,a LICENSEE EVENT REPORT CONT 7;OL SLOCK: [ l l l l l 1 6 lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 10 l1I 7 8 9 IM I D ! C IC lN I1 j@l0 lo I 10 lo lo lo lo l CON'T LICENSEE CODE 14 15 LICENSE Nt.W8ER lo in J@l425 26 l1LICENSE 11 11 l1 l@l67 CAT 68 @ l l TYPE JO 10I$1 _ Z "C 7 8 l L j@l 0 15 l 0 10 10 13 1169(7 l@l0 60 61 CaOCK ET NVYSE R 68 EVENT DATE 15 12 10 18 10 l@l0 16 10 13 18 74 75 REPORT DATE 80 EVENT DESCRIPTION ANO PROBASLE CONSEQUENCES h t o ! 21 [WHILE IN HOT STANDBY. REALIGNMENT OF THE CONDENSATE ' I

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lo 63 i IHEADER SUPPLY VALVES RESULTED IN THE ISOLATION OF lTHE 10141 1 AUXILIARY FEEDWATER PUMPS, THEREBY VIOLATING THE PROVISIONS i to is] I SPECIFICATION 3.7.1.2. THE STEAM GENERATOR FEED PUMPS REMAINED OPERABLE, I [5" O [AND WERE BEING UTILIZED TO REMOVE LERDECAY 50-317/75-58 HEAT. (U-I) '- 1 I o ! 71 lDESCRIBES A SIMILAR OCCURRENCE. I PInn 1 7 8 , C 80 CODE SUSC E COMPONENT CODE lo19J s SU E 7 6 (C lH 16 LAJ@ LA_j@ LV l A l L l V I E l X l@ V8COC'El Z l @ LF,_J @ 9 10 tt 12 13 18 19 20 LE a 8 EVENT YEAR REPORT O

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CODE L--J t012161 1-1 10111 N, AKEN A 21 22 3 24 26 27 28 29 LIJ 30 L---J 31 Lo.J ON ON PLA T ME 32 HOURS S8 1 0 FOR Inl@LGJ@ 3J 34 LIJ@ Iz_J@ l0101010i

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41 L_id@ LLj@ CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 42 43 l 7 I o I o I 47o l@~ 44 (1 6 01 lAN ERROR IN TRANSPOSING VALVF UUMRFRS INTO TMF 10rvF0 Val vp DEV l riTr1 [RESULTED IN THE INCORRECT RFALIGNMENT A CHFCVI79T OF MAR THE Retn SYSTEM. I iii2; A il # 2 i I 1 DDED TO THE PROCEDURE TO REQUIRE TWO INDEPENDEN l .. I 1i t 41 1 . = 7 8 9 . . _ . .. - ST S  % POWER _ OTHER STATUS ,, is O Ry Ii is 1 La_J@ ' l 01010J@l"

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{

1 LER NO. 80-26/1T DOCKET NO. 50-317 EVENT DATE 0S/20/80 . REPORT DATE 06/03/80

 ,      ATTACHMENT l

EVENT DESCRIPTION AND PROBABLE CONSEOUENCES: \ ON MAY 20, 1980, DUE TO A DEGRADATION OF THE SERVICE WATER SYST .

                                                                                                         ~
                                                               .11 CONDENSATE STORAGE                            m(

TANK (AFP) AND (CST) THE WASUNIT ALIGNED 1 SUPPLY TOVALVE THE FROM NO.12SUCTION.0F MPS ~ =

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WERE TAKEN AT APPROXIMATELY 8:30 P.M. . THESE ACTIONS- - 10:00 P.M., THE CST'S WERE REALIGNED TO THEIR . WHILE NORMAL g C T REPORTED TO THE SENIOR CONTROL ROO RATOR +'1

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PRESSURE FOR THE INDICATING THAT THE SUCTION SIDE THE UNIT 1 AUXILIARY VALVE , FEED _ LINE-UP OPUM N~~@ SCR0 DIRECTED THE OUTSIDE AFP SUCTION; APPARENTLY THE DIRECTIONS GIVEN OPEPATOR - (0S0).TO HE TO .i C J :2 THE

                                                                                  . . WERE                      N' INCORRECT AND HAD RESULTED IN FROM THE UNIT 1 AFP'S.                                                              THE TOTA BOTH STEAM GENERATOR FEED PUMPS REMA                         .

_CAUSE DESCRIPTION NID CORRECTIVE ACTIONS: THE PRECISE SEQUENCE OF EVENTS LINE-UP IS AS FOLLOWS: WHICH APP 1. FOLLOWING THE PLANT TP.IP, THE AFP'S WERE USED TO RE STEAM GENERATOR LEVELS; DUE TO THE REQUIREMENT T A MINIMUM TO NO.11 CST LEVEL IN NO. 12 CST. AT APPR0XIMATELY 8:30 P.M. THE AFP SUCT 2. AT APPR0XIMATELY 9:30 P.M., A STEAM GE SHUTDOWN.

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AT (CRO)APPR0XIMATELY DIRECTED A CHANGE 10:00 P.M. IN THE UNIT VALVE LINE-UP 1 ?NCON TO CST AS THE SUPPLY TO THE UNIT 1 AFP'S. . 12 -d INCORRECTLY DESIGNATED THE VALVES TO BE OPERATED.IN d~ DOIN TO THE 050 WERE GIVEN BY VALVEdENUMBER AND R 050 TION FOR 1-AFW-167 AND l-AFW-161 . THIS (SEE FACT THAT WERE REVERSED. THE VALVE DESCRIPTI THE REVERSAL CAUSED 1-AFW-161 TO BE SHUT AND 1-AFW-167 TO BE OPENED, INSTEAD OF THE CORRECT -

                                                                                                           ~=

WHICH WOULD HAVE 1-AFH-161 OPEN AND 1-AFW-167 . V-AS STATED DURING THE 1:00PREVIOUSLY, A. M. ROUNDS. THIS ERROR WAS CORRECTED IMM TIME THE VALVES WERE MISALIGNED.THE PLANT REMAINED IN H0DE 3

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LER 80-26/1T

                                                          . June 3, 1980J                                                za
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                                                                                                                           .m A CHECKLIST HAS BEEN INSTITUTED OPERATOR CONDUCTING THE VALVEAND     ALIGilMENT UHICH REQUIRES~ ~VERIFIC                           *'                     'd

- BY THE SCR0 THAT THE VALVES .. -.

                                                                                                                           .iw PE0VIRED     TO SHIFT   AFP  SUCTIONS WHENEVER REALIGNMENTS ARE MADE.              ARE PROPERLY ALIGNED                          ?"                     ~- M T ADDITIONALLY, AFTER EACH REALIGNMENT, THE SUCTION PRESSURE FOR THE AFP'S WILL BE READ AND
                                                                                                        - - 47N LIST TO ENSURE THE AVAILABILITY OF A WATER SUPPLY                                        TO THE:-.:AF               in ALL                                                               .

PLANT OPERATORS HAVE BEEN CAUTIONED THAT VALVES 2-WHICH 3 A ALREADY BE IN THE POSITION TO WHICH THEY ARE DIRECTED . - :.--* T SHALL BE REPORTED TO THE CONTROL ROOM PRIOR TO ANY ~~~-- REAL

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