05000289/LER-1977-012, RO 77-12/3L:on 770519,engineered Safeguard Pump MU-P-1A Was Removed from Svc Prior to Testing Operability of Redundant Pump.Caused by Personnel Error.Redundant Pump Tested Satisfactorily on 770519.Forwards LER 77-12/03L

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RO 77-12/3L:on 770519,engineered Safeguard Pump MU-P-1A Was Removed from Svc Prior to Testing Operability of Redundant Pump.Caused by Personnel Error.Redundant Pump Tested Satisfactorily on 770519.Forwards LER 77-12/03L
ML19261F336
Person / Time
Site: Crane 
Issue date: 06/09/1977
From: Herbein J
METROPOLITAN EDISON CO.
To:
Shared Package
ML19261F337 List:
References
GQL-0790, GQL-790, NUDOCS 7910250795
Download: ML19261F336 (3)
v • d • e


LER-1977-012, RO 77-12/3L:on 770519,engineered Safeguard Pump MU-P-1A Was Removed from Svc Prior to Testing Operability of Redundant Pump.Caused by Personnel Error.Redundant Pump Tested Satisfactorily on 770519.Forwards LER 77-12/03L
Event date:
Report date:
2891977012R00 - NRC Website
v • d • e

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Dear Sir:

Docket No. 50-289 Operating license No. DPR-50 In accordance with the Technics 1 Specifications of cur Three Mile Island Nuclear Station Unit 1 (TMI-1), we are reporting the folleving reportable occurrence.

(1) Report Number: 77-12/3L (2a) Required Report Date: 06-17-77 (2b) Date of Occurrence: 05-19-77 (3) Facility: Three Mile Island Nuclear Station - Unit I (k) Identificaticn of Occurrence:

Title: Engineered Safeguards pu=p was removed prior to testing redundant pu=p.

Type: A reportable occurrence as defined by Technical Specificatiens 6.9.2.3.(3) in that, Engineered Safeguard pump MU-P-1A was removed frem service prior to testing the operability of the redundant pu=p, MU-P-lC, violating sections 3.3.4, of the Technical Specifications, and resulting in an inadequacy in the implementation of procedural acntrols which threatened to cause a reducticn in the degree of redundancy of an engineered safety fe ature.

(5) Conditions Prior to Occurrence Pcwer: Core: 192h Elec: 631 RC Flev:

lhhx106 lbs/hr RC Pressure:

2155 psig RC Te=p:

579cy 1482 072 P'iZR Level:

220 inches PR"R Te=p:

oL5 F (6) Descriptien of Occurrence:

While escalating to 755 pcVer felleving the refueling cutage Engineered Safeguards pump, MU-P-1A, was re=cved frem service prier to testing the Operability Of the redundant Engineered Safeguard pump, MU-P-lC.

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June 9,1977 Mr. J. P. O'Reilly GQM 0790 (T) Apparent Cause of Occurrence:

The cause of this occurrence has been determined to be personnel in that, at the time MU-P-1A was removed from service the Shift Foreman failed to Lnplement the req 2 ire =ent to test the redundant pump.

(3) Ana2yais of Occurrence:

It has been determined that this occurrence did not constitute a threat to the health and safety of the public in that, the redundant pump, MU-P-1C, had been demonstrated cperable ten (10) days prior to the occurrence, and again found operable five (5) hours after the occurrence. Therefere:

MU-P-lC was operable during the time of this occurrence.

(9) Corrective Action:

Inmediate : At 1230 heurc en May 19, 1977, the redundant Es pump, MU-P-lc, was tested satisfactorily.

Long Tern: The Shift Supervisors, Unit I Shift Foreman, and the Centrol Roc = Operators have been briefed on this cccurrence and reminded of the general need for =cre e=phasis to follow procedures and the specific requirements of Technical Specification 3.3.4.

The Plant Operations Review Cc=mittee and Unit Superintendent have reviewed and approved the above corrective action and have taken steps to assure its cc=pletion.

(10) Failure Data: NA Similar Occurrences: 76 h9 Sincerely, t$h

'J. G. Herbein Vice President JGH:DGM:J=r

Enclosure:

LER 1482 073

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