ML20005E397

LER 89-019-00:on 891128,discovered That HPSI Discharge Header Isolation Valves Not Locked Shut When RCS in Water Solid Condition,Resulting in Operation Outside Design Basis. Procedure Revised to Require Valves closed.W/891228 Ltr

ML20005E397
Person / Time
Site:	Calvert Cliffs
Issue date:	12/28/1989
From:	Furio P, Russell L BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
LER-89-019, LER-89-19, NUDOCS 9001050176
Download: ML20005E397 (2)

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% . .. . BALTIMORE

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~ CALVERT CLIFFS NUCLEAR POWER PLANT DEPARTMENT CALYERT CLEFS NUCLEAR POWER PLANT -

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~ December- 28,:1989-

~U.1S. Nuclear Regulatory Commission Docket ~No. 50-317 4 ' Document ~ Control Desk License No. DPR 53:

. Washington, D. C. 20555-

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Dear Sirs:

-The attached LER 89 19, Revision 0, is being sent to you as required under 10 CFR 50.73 guidelines.

2Should you have any questions regarding this report, we would be pleased to discuss them with you'.-

.Very truly yours, L. B. Russell Manager-Calvert Cliffs Nuclear Power Plant Department JMO:sb cc: William T. Russell Director, Office of Management Information t.nd Program Control Messrs: G. C Creel C. H. Cruse R. E. Denton J. R. Lemons 9001050176 891228 DR ADOCK0500g7 f \

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W Fe m 398 U 8. CUCLE AM t.E1UL ATGAY COMMISSION

. , , . D APPIOVED OMS N),31004%4 LICENSEE EVENT REPORT (LER) ' N'S 8m F ACILITY NAMI (11 DOCKET NUMSE R (2) PAGE (3)

- Calvert Cliffs, Unit 1 o 15 t o j o l o l 3 l1 l7 1 lorl1 l l'n'i$plementedRequirement to Lock the llPSI Discharge 11eader Isolation Valves Shut Results in Operations Outside the Low Temperature Overoressure Protection Desien Basis IVENT DAf f (Si LER NUMSER (Si REPORTDAftin OTHt P F ACGITIES INVOLVED IS)

MONTH DAY YEAR V5AR *I,OVE y *y ','b ['jg,Q 8

MONTH DAY vtAR F ACILIT Y hauts DOCKET NUMBERi$)

Calvert Cliffs. Unit 2 015 l0 l o j o ;3 i 3l g

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,,,,,,,,, THis RsPoRT is susMiTTso PURSUANT To Tus RaouiRrMENT: of 30 CPR 5: tea.ca e,. er ea ren. ass tiin M005 M) 5 20 402mi 20.= wi .0 n.H2H > nnai 20 405teH1HH $0.3McMil 60.73teH2Hvi , 73 ?11el (101 0 l 0l 0 204m,NinHai so mNH2 son.H2H ni

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ps s 20 406(a Ht Hiel X 60.73(eH2Hul 60.73 kit 2Hvdil(B) 20.40misilt Hvi 60.73taH2HiHI 50.73ieH2Hal LICENSEE CONTACT FOR THl3 Lt81 It2)

NAME TE LEPHONE NUMBER P. S. Furio-Licensing Engineer aREACooE 3 p l1 2; 6 l0 p ;4 g3 g7 l4 COMPLETE ONE LINE FOR E ACH COMPONENT F AILURt DESCRISED IN THis REPORT H31

1. #0' "# AC. R T i CAust SYSTEM COMPONENT y a,ppf8 CAUSE SYsTIM COMPONENT g O PR I I I I I I I I I I i l l I I I I I I l l I I I I I I I SUPPLEMENTAL REPORT EXPECTED (141 MONTH DAY YrAR Sv8Mi$$10N

~~R] YE s rin u. -,.= anectro suewssioN 04 ris ~~-)No Ol1 3l1 9l0 Aes1R Act an , M um wa >.. .an. ,.mv un ..o,.nua ram an a a om At 1155 on November 28, 1989, a condition was discovered at Calvert Cliffs Units 1 and 2 which did not satisfy the plant design basis established in the Low Temperature Overpr. essure Protection (LTOP) Safety Evaluation Report (SER). It was determined that the Hi,h f Pressure Safety Injection (HPSI) Discharge Header Isolation Valves had not been locked shut during previous operations when the reactor coolant system (RCS) was in a water solid condition. At the time of discovery, Unit I was in cold shutdown with the RCS partially drained, and at atmospheric pressure and 111 F. The Unit 2 reactor was defueled, with the RCS partially drained, the vessel head installed (detensioned), and the RCS at atmospheric pressure and 79 F.

Interim corrective actions have been implemented. Prior to our entry into a water solid condition, we revised the operating procedures to require that the HPSI header isolation valves be closed, de-energized and tagged when the RCS temperature is below 200 F. Currently, Unit 1 is in MODE 5 (C 200 F) and will remain in MODE 5 until all LTOP commitments are identified and resolved as applicable. Unit 2 is defueled and will not enter a water solid condition, with fuel, until the applicable LTOP issues are resolved. All other information required by 10 CFR 50.73 will be provided in a supplemental LER when our investigation into LTOP commitments is completed.

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