ML19325C198

LER 89-014-00:on 890905,operations Personnel Recalled That SP1093.1 Performed Two Wks Previously Instead of SP1093.2. Caused by Personnel Error in Selecting Incorrect Procedure. Proper Notifications Made & SP1093.2 performed.W/891005 Ltr

ML19325C198
Person / Time
Site:	Prairie Island
Issue date:	10/05/1989
From:	Hunstad A, Parker T NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation
References
LER-89-014, LER-89-14, NUDOCS 8910120199
Download: ML19325C198 (4)

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u ** j Northem States Power Company j 414 Nicollet Mall Minneapolis, Minnesota $54011927 ,

Telephone (612) 330 55C3 l i

October.5, 1989 Report Required by )

10 CFR Part 50, Section 50.73  !

J Director of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission l Attn: Document Control Desk j Washington, DC 20555 l i

PRAIRIE ISLAND NUCLEAR GENERATING PLANT Docket No. 50 282 License No. DPR-42 +

50 306 DPR-60 i

Surveillance Test Performed Late Due to Personnel Error i

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The Licensee Event Report for this occurrence is attached.

Please contact us if you require additional information related to this event.

homas M. Parker 1 Manager ,

Nuclear Support Services c: Regional Administrator Region III, NRC Sr Resident Inspector, NRC NRR Project Manager, NRC MPCA Attn: Dr J W Ferman Attachment '

8910120199 891005 8 Jl PDR ADOCK 05000282 I g PDC

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l Technical Specification Table TS.4.1-1, items #19 and 39 require that automatic load sequencing and loss of voltage on the 4KV safeguards buses be tected monthly. This is normally accomplished during surveillance testing of the safeguards diesel generators. D1 Diesel Generator can supply Bus 15 for Unit 1 and Bus 26 for Unit 2. Separate procedures, SP1093.1 (D1 Diesel Generator to Bus 15) and SP1093.2 (D1 Diesel Generator to Bus 26), are each performed once a month. SP1093.2 was scheduled to be performed on August 22, 1989. When preparing to perform the procedure, SP1093.1 was apparently selected from the file drawer by mistake, and was performed satisfactorily.

On September 5, 1989, when SP1093.1 was scheduled to be performed, operations personnel recalled that SP1093.1 had been performed only two weeks previously.

A review of the Reactor Legs showed that SP1093.1 had been performed on August 22, 1989, instead of the scheduled SP1093.2. Proper notifications were made, l and SP1093.2 was performed immediately and the test was satisfactory.

Cause of the event was personnel error in selecting the incorrect procedure from the controlled procedure file.

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EVENT DESCRIPTION On September 5, 1989, both units were operating at 1006 power. Technical Specification Table TS.4.1 1, items #19 and 39 require that automatic load

- sequencing and loss of voltage on the 4KV safeguards buses (EIIS Identifier BU) be tested monthly. This is normally accomplished during surveillance testing of the safeguards diesel generators (EIIS Identifier DG). D1 Diesel Generator can supply Unit 1 Bus 15 and Unit 2 Bus 26. Separate procedures, SP1093.1 (D1 Diesel Generator to Bus 15) and SP1093.2 (D1 Diesel Generator to Bus' 26), are each perfornied once a month. SP1093.2 was scheduled to be performed on August 22, 1989. When preparing to perform the procedure, SP1093.1 was apparently selected from the file drawer by mistake, and was performed satisfactorily. On September 5, 1989, when SP1093.1 was scheduled to be performed, operations personnel recalled that SP1093.1 had been performed only two weeks previously. A review of the Reactor Logs showed that SP1093.1 had been performed on August 22, 1989, and that SP1093.2 had not been performed in August. It was concluded that SP1093.1 had been performed on August 22, 1989, instead of the scheduled SP1093.2. Proper notifications were made, and SP1093.2 was performed immediately and the test was satisfactory.

CAUSE OF THE EVENT Personnel error in selecting the incorrec procedure from the controlled procedure file.

ANALYSIS OF THE EVENT This event is reportable pursuant to 10CFR50.73(a)(2)(1)(B). Technical Specification Table TS.4.1-1, items #19 and 39 require that automatic load sequencing and loss of voltage on the 4KV safeguards buses be tested monthly.

The July test of Bus 26 was satisfactory. The next test of Bus 26 was performed 6 days late (September 5th) and was also satisfactory.

Therefore, it is believed that the automatic load sequencinF and loss of voltage circuitry was operable during the period. Health and safety of the public were unaffected.

All surveillance requirements for the diesel generators were met during this period.

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'I CORRECTIVE ACTION The test procedures will be changed to add clarification or verification steps i to assure performance of the scheduled procedure. .

i PREVIOUS SIMilAR EVENTS i

There were several instances of missed surveillance tests over the past  ;

several years, but none of them had a cause similar to this event.  ;

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G C Pam Mt. 4609.