ML20012B807

LER 90-001-00:on 900210,determined That Core Spray Loops a & B Inoperable Due to Missed Surveillance.Cause Not Stated. Investigation continuing.W/900309 Ltr

ML20012B807
Person / Time
Site:	Brunswick
Issue date:	03/09/1990
From:	Harness J, Jones T CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
BSEP-90-0212, BSEP-90-212, LER-90-001-03, LER-90-1-3, NUDOCS 9003160328
Download: ML20012B807 (2)

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Carolina Power & Light Company -

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Brunswick Nuclear Project i P. O. Box 10429 p.; Southport, NC; 28461-0429 D T Narch 9, 1990-E b

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J - FILE: B09-135100 10CFR50,i3-y ,  : SERIAL: BSEP/90-0212 ,

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$'4 . U.S. Nuclear Regulatory Commission M  :

ATTN:- Docurrent Control Desk

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d, BRUNSWICK STEAM ELECTRIC PLANT UNIT 2

% DOCKET NO. 50-324

. n- LICENSE NO. DPR-62 1, LICENSEE EVENT REPORT 2-90-001 p;; y l

4 Gentlemen:

In accordance with Title 10 to the Code of Federal Regulations,Lthe enclosed-Licensee Event Report is submitted. This. report fulfills the requirement for

h a written' report within thirty (30) days of a reportable occurrence and is in accordance with the format set forth-in'NUREG-1022, September 1983.

a Very truly yours, I

J. L. Harness, General-Manager Brunswick Nuc1 car Project TH/mcg

. Enclosure cc: Mr. S. D. Ebneter

'Mr. E. G. Tourigny j,

BSEP NRC Resident Office 79

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. Brunswick Steam Electric Plant Unit 2 0151010 0131214 1 l0Fl l

- Outside Technical Specification Due to Missed Surveillance; LPCI a,nd CS Subsystems ~

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On February 10, 1990, it was determined that the Unit 2 Core  !

' Spray (CS) loops A and B were inoperable.because of a missed surveillance. A maintenance surveillance test (MST) used to  ;

satisfy Technical Specifications (TS) for both CS and the Low i Pressure Coolant Injection (LPCI) system had not been performed.

The test, 2MST-RHR26M, "RHR/CS Lo Reactor Pressure Permissive Trip Unit Channel Calibration", had been excepted from performance on September 25, 1989, due to the systems being out of service (refuel outage). The MST was added to the supplement sheet of existing RHR LCOs, but not on the CS LCOs, l On February 6, 1 , both CS loops were declared operable on the I

basis that the work items listed on the LCO supplement sheets were completed. At 1305 on February 7, the spent fuel pool gates were installed, resulting in the requirement that at least two low pressure core cooling sub-systems be operable (TS 3.5.3.1).

This was discovered at 1300 on February 10, and CS was declared inoperable. At 1454, the MST was completed and operability was declared. An investigation into this event is continuing and results will be reported in a supplement to this LER by April 12, 1990. This event had minimal safety significance.

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