ML18347A850

License Event Report 1980-021-00 Re Misaligned Containment Sump Valve

ML18347A850
Person / Time
Site:	Palisades
Issue date:	08/06/1980
From:	Hoffman D Consumers Power Co
To:	James Keppler NRC/RGN-III
References
LER 1980-021-00
Download: ML18347A850 (4)

Text

consumers Power company General Offices: 212 West Michigan Avenue, Jackson, Michigan 49201

• Area Code 517 788-0550 August 6, 1980 Mr James G Keppler Office of' Inspection and Enforcement Region III U S Nucl*~*s.::." Eegulatory Commission 799 RooseYelt Road Glen ElJ_yn, IL 60137 DOCY.E'I 50-255 - LICENSE DPR-20 *-

F.A.LISADES ?LA.NI' - LICENSEE EVENT REPO?.T 80--021 - lvEISALIG.NED CONTAINMENT S1JMP VALVE The attached Licensee Event Report 80-021 j_ s reportable unde:c 'i'echnj_eal Speci-;::*i-cation 6. 9. 2.A. 2 and involved the misaligr...ment during ;iower ope!:"'atiQn of contair:-

Nen0 su.~p isolation (CV-3030) valve.

David f' H;.,~clear

-LJ~C*:?,rl3ll1g Administrator CC Director, Office of Nuclear Reactor Regulation Director, Office of Inspection and Enforceme!lt.

NRC Resident Inspecto2~ - Palisades Attachment - 3 :pages Aoo?.

s 1 Ir 7

PALISADES PLANT NRC FORM366 U.S. NUCLEAR REGULATORY COMMISSION (7-77)

LICENSEE EVENT REPORT CONTROL BLOCK: I 10 !PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6

[ill] IM I rl P I A I LI :LJG)I ol o I .-Io Io I ol o I o I- Io lo 101 411 I 1 I ii 11©1 I I0 7 8 9 LICENSEE COOE 14 ,5 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 CON'T Wil  :~~~~~ LIJ©I o I s Io I o I o I 2 I 5 I 510)1 o l1 I 2 15 I s I o I© I o IS I a I 6 Is I a 10 7 B 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES @

I On July 25, 1980, during the performance of a gua~terly surveillance test

[)):I] I (valve ISI program) an operator inadvertently opened containment sump

!Im I valve CV-3030. This valve on the suction side of the containment spray HPSJ:i

[il!] land LPSI :gum:gs is normally closed during J;>lant o;ueration. CY-3030 wa.s (QI[] 1open 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. This condition is reportable under Technical Specifications1

[§]IJ 6. . 2.A.2.

[ill]

7 8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE .COMPONENT CODE SUBCODE SUBCODE CilII I SI Fl@ 1!.J@ 1!..J@ I VIA IL IV IE pc I@ w@ w@

7 8 9 *o 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION

!.'::'\ LEA/RO LVENTYEAR REPORT NO. CODE TYPE NO.

~ REPORT NUMBER 18 I 0 I I I I o I 21 i I I/ I Io I 1 I L1'..J l=1 LQJ 21 22 23 24 26 27 2B 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN r:;:::-, ATTACHMENT NPR~ PRIME COMP. COMPONENT TAKEN ACTION ON PLANT METHOD HOURS ~ SUBMITTED FORM SUB, SUPPLIER MANUFACTURER ILJ@LxJ@

33 34 LI.I@

35 LZ..J@)

36 Io I olo Io I 37 40 l1J@

41 IJU@

42 W@

43 I WIO 131 OI@)

44 47 CAUSE DESCRIPTION AND CORREc*nve ACTIONS @

IOpera*Gor error resulted in the opening of CV-3030 during a routine quarter-I 1JJJJ llY valve ISI surveiilance activity. Valve CV-3001 (containment spray valve)1 IIlJ] Iwas the intended valve to be cycled. The handswitches for CV-3030 and CV

[I))] 13001 are side .by side on the main control console. Correctiye action and rr:m I additional details are *mrovided on the attachment.

7 B 9 80

~LITY ~ METHOD OF A STATUS  % POWER OTHER STATUS \.::;:J DISCOVERY DISCOVERY DESCRIPTION ~

[!TI]~@ IO 191 Ol@l_N_A_ _ _ ___ ~~-l__L_i_c_e_n_s_e_d__O_p~e_r_a_t_o_r _________________,

7 B 9 10 12 13 44 45 46 80 ACTIVITY CONTENT . ~

. RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE @)

ITEi 7 8 W@

9

~@I NA 10 . 11 44 I 45 NA 80 PERSONNEL EXPOSURES r.;";:\

NUMBER r.;:;., TYPE~ DESCRIPTION

[QI]

7 8 9 I a I al 11dlzJ~----------------------------'

12 13 80 PERSONNEL INJURIES ~

DESCRIPTION~

E:fil I a I NUMBER ol d@.........,...,,A_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ___.

7 8 9 11 12 80 LOSS O~ OR DAMAGE TO FACILITY t4:i'1 TYPE DESCRIPTION -..;:;:J

[Q'IJ 1 8 9 lz.J@)-....N=A-----------------------------------------------------

10 80 PUBLICITY ~ NRC use ONLY ISSVJ:D DESCRIPTION 45

[I[2J L!J{§)I Press elease I 11 I I I I I I I I I I I 7 8 9 10 68 69 80

CONSUMERS POWER COMPANY Attachment to LER 80-02l/T-O PALISADES PLANT Docket 50-255 License DPR-20 Description of Occurrence During routine testing of valves at approximately l930 on July 25, 1980, an oper-ator inadvertently opened the isolation valve between the containment sump and engineered-safeguards pumps P-54B and P-54C (containment spray), P-67B (LPSI) and P-66B and P-66c (HPSI). The valve (CV-3030) is normally closed, remains closed during the injection phase of a safety injection sequence, and is opened by low level in the Safety Injection and Refueling Water (SIRW) tank. The corresponding valve (CV-3029) in the second line from the containment sump to the redundant set of engineered-safeguards pumps was closed. CV-3030 remained open until approxi-mately 0730 on July 27, 1980. Determination that this occurrence was reportable occurred at 1215 on July 28, 1980.

Significance/Probable Consequences The open valve caused the pumps described above to have two suction paths; one from the SIRW tank (normal) and another from the normally dry containment sump.

During this event, the plant was operating at approximately 90 percent power and the misaligned valve did not have any adverse impact on plant operation or on public health and safety. Under postulated accident conditions with high containment pressure (eg, greater than SIRW tank head of approximately 32 psig),

the affected set of LPSI, HPSI and containment spray pumps could become airbound.

In addition, under postulated accident conditions a release path from containment to the vented SIRW tank could exist until the Recirculation Actuation Signal occurs. The alternate set of HPSI, LPSI and containment spray pu."Ilps would have had their normal suction supply from the SIRW tank. A review of operating records revealed no inoperable er"gineered safety features associated with the unaffected flow path.

Corrective Actions After discovery of CV-3030 being open, the valve was closed. The operator involv-ed was relieved of watchstanding duties, provided additional counseling as to his responsibilities and attentiveness while on duty, and after resumption of duties will be closely observed by the Shift Supervisor.

The valve's position is displayed on the control panel and changes of position of the valve are recorded on a data logger. "Benchmarks" indicating normal system alignments for power operation have been placed on control room panels to aid operators in determining off-normal conditions. The shift turnover checklist has been revised to include verification of system alignment of all engineered safety features by comparison of switch positions and indicating lights with their bench-marks. CV-3029, CV-3030 and other valves essential for engineered safety features performance have been added to the checklist. The checklist also includes a require-ment to document any keys inserted into keylocks and to explain their presence.

Periodic review of data logger printouts are being performed to detect system align-ment changes.

This occurrence has been discussed with Shift Supervisors and other licensed oper-ators. Their responsibilities in maintaining correct system alignments and in recognizing the significance of off-normal alignments was re-emphasized.

Attachment to LER 80-021/T-O 2 August 6, 1980 To provide continuity during shift change periods, Shi~ Technical Advisor (STA) relief times have been staggered by two hours from the remainder of the shift.

The STA's responsibility in providing engineering evaluation for varying plant operating conditions has been re-emphasized.