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LER 89-001-00:on 890103,2C Sec Declared Inoperable Due to Auto Test Fault.Caused by Equipment problems.2C Chassis Replaced & Tested successfully.W/890201 Ltr
	ML18093B420
Person / Time
Site:	Salem
Issue date:	02/01/1989
From:	Miller L, Pollack M; Public Service Enterprise Group
To:	; NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
	LER-89-001, LER-89-1, NUDOCS 8902070152
	Download: ML18093B420 (5)
	v • d • e

NRC l'orM . . U.1. NUCLEAll llEGULATOllY COllW*ION (9.a.31 AWROVED. OMI NO. 311111-4104 EXPIRES: 11/31 . .

LICENSEE EVENT REPORT (LER) r--*

I FACILITY NAME Ill DOCKET NUMll!ll 121 I 1"1 Salem Generating Station - Unit 2 . O 15 I O IO I o 13 I 11 l 1 loF O 14 TITLE I~

Tech. Spec. 3.0.3 Entry .,... 2 SW lleaders In_operable Du~ To_.Equipmen~ Prob~ems EV NT OAT 1111 LER NUMDER Ill REPORT DATE 171 OTHEll FACILITIEI INVOLVED Ill MONTH DAY YEAR YEAR }t SE~~~~i~AL tf =~~~ MONTH OAY YEAR FACILITY NAMES OOCKET NUMllERISl

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Z0.4111111all11M ll0.73ClllZllllll ll0.731111211*1 LICENSEE CONTACT FOR THIS LER 1121 NAME AREA CODE M. J. Pollack - LER Coordinator COMPLETE ONE LINE FOR EACH COMPONENT FAILURE OEICRllED IN THll REl'OllT CAUSE SYSTEM COMPONENT MANUFAC* MANUFAC-TUR ER SYSTEM COMPONENT TUR ER I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1!1 1 !1l !l !l ! !l! il! i !l l! !l !l!i ~i l!l IUPPLEMENTAL REPORT EXPECTED 1141 MONTH vi EXPECTED

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SUBMISSION f YES (If yn, comploro EXPECTED SIJBMISSION OATEJ N°0 CATE 1151 I I I AllTRACT (L.lmlt ID 1400 ,,,.,,,., I.*** *pproxlm*r.ly flftHn rlnglH,,.ct ry,,.wrlrttn /inn} 11111 On January 3, 1989 at 1123 hours0.013 days 0.312 hours 0.00186 weeks 4.273015e-4 months , No. 2C SEC was declared inoperable due to an Auto Test Fault. This SEC will start Nos. 25 and 26 SW pumps during a station blackout. Nos. 22 and 23 SW Pumps were inoperable due to: No. 22 SW Pump was cleared and tagged to facilitate the replacement of the diaphragm for the SW Strainer Blowdown Control Valve, 22SW24; this work was scheduled as preventive maintenance and No. 23 SW Pump had failed its 4.0.5-P surveillance due to low SW flow. Technical Specifica.tion Action Stat:ement 3. 0. 3 was entered due to four inoperable Service Water (SW) Pumps {BI}.

Operations procedure OD-12, Tech Spec Interpretations", addresses the interpretation of Techni9al Specification 3.7.4., which requires two operable Service Water (SW) {Bii loops in Modes l, 2, 3, and 4. OD-12 specifies which combination of SW Pumps, when inoperable, define a SW loop as inoperable. With four (4) SW Pumps inoperable credit for an operable SW Loop cannot be taken. The root cause of thi~ event is **

attributed to equipment problems. The 2C SEC chassis was replaced and tested successfully. Technical Specification Action Statement 3.0.3 was subsequently exited at 1535 hours0.0178 days 0.426 hours 0.00254 weeks 5.840675e-4 months on January 3, 1989.

Investigation of the No. 23 SW Pump low SW flow h.as been completed.

The pump wearing ring clearance has been adjusted. The pump was.

sub~e~uently tested successfully.

8902070152 890201 PDP ADOCK 05000311 NRC Form 3IMI F'DC 19-831

Salem Generating Station LICENSEE EVENT R:'... ..0 *)RT. (LER) TEXT CONTINUATION DOCKET NUMBER LER NUMBER PAGE Unit 2 __ ----------~_Q_Q_Q)JJ..______________8_9_--:-_Q_QJ_=_Q_Q _______ ~---9~3__ _

!_'_LANT AND SYST_~~J:_p_E_N1Ji'J_c;:;h'.l'I9_N:

Westinghouse - Pressurized Water Reactor Energy Industry Identification System (EIIS) codes are identified in the text as {xx}

IDENTIFICATION OF 9_~~~~~~~9E:

Technical Specification 3.0.3 Entry - Two Service Water Headers Inoperable Due To Equipment Problems Event Date: 01/03/89 Report Date: 02/01/89.

This report was initiated by Incident Report No.89-013.

CONDITIONS

-- - - - - - - - - - - - - - - PRIOR TO

- - ---- ---- OCCURRENCE:

Mode 4 Reactor Power 0% - Unit Load 0 MWe DESCRIPTION OF OCCURRENCE:

On January 3, 1989 at 1123 hours0.013 days 0.312 hours 0.00186 weeks 4.273015e-4 months , Technical Specification Action Statement 3.0.3 was entered due to four inoperable Service Water (SW)

Pumps (Bii. Oper~tions procedure OD-12, "Tech Spec Interpretations",

addresses the interpretation of Technical Specification 3.7.4, which requires two operable Service Water (SW) {Bii loops in Modes l, 2, 3, and 4. OD-12 specifies which combination of SW Pumps, when inoperable, define a SW loop as inoperable. With four (4) SW Pumps inoperable credit for an operable SW Loop cannot be taken.

Technical Specification 3.7.4 states:

"At least two independent Service Water loops shall be OPERABLE.

APPLICABILITY: MODES l, 2, 3, and 4 ACTION:

With only one service water loop OPERABLE, restore at least two loops to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months ."

On January 3, 1989 at 1123 hours0.013 days 0.312 hours 0.00186 weeks 4.273015e-4 months , No. 2C SEC was declared inoperable due to an Auto Test Fault. This SEC will start Nos. 25 and 26 SW pumps during a station blackout. With the Unit already entered in Technical Specification Ac~ion Statement 3.7.4 due to inoperability of Nos. 22 and 23 SW Pumps, Technical Specification Action Statement 3.0.3 was entered as per OD-12 at 1123 hours0.013 days 0.312 hours 0.00186 weeks 4.273015e-4 months that day.

Nos. 22 and 23 SW Pumps were inoperable due to:

9*-

LICENSEE, EVENT REPORT ( LER) 'l'; *.:~T CONTINUATION Salem Generating Station DOCKET NUMBER LER NUMBER PAGE Unit 2----------------~

5000311 89-001-00

*--------- - - - - - 3 of 4 No. 22 SW Pump - This pump was cleared and tagged to facilitate the replacement of the diaphragm for the SW Strainer Blowdown Control Valve, 22SW24; this work was scheduled as preventive maintenance No. 23 SW Pump - This pump had failed its 4.0.5-P surveillance due to low SW flow (reference Incident Report 88-521)

Technical Specification Action Statement 3.0 .. 3*states:

"When a Limiting Condition for Operation is not met except as provided in the associated ACTION requirements, within one hour action shall be initiated to place the unit in a MODE in which the specification does not apply by placing it, as applicable, in:

1. At least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months ,

2. At least HOT SHUTDOWN within the following 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months , and

3. At least COLD SHUTDOWN within the subsequent 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

Where corrective measures are completed that permit operation under the ACTION requirements, the ACTION may be taken in accordance with the specified time limits as measured from the time of failure to meet the Limiting Condition of Operation.

Exceptions to these requirements are stated in*the individual specifications."*

The root cause of this event has been attributed .to equipment problems. 2C SEC had been declared inoperable due to an "Auto Test Fault" alarm condition. The alarm would not clear. Investigation revealed that an SEC logic circuit card had failed.

ANALYSIS

--- OF OCCURRENCE:

The operability of the SW System ensures sufficient cooling capacity is available for continued operation of safety-related equipment during normal and accident conditions. The system consists of two (2) cross connected headers (3 pumps per header) which provide redundant cooling capacity consistenL with the assumptions used in the Updated Final Safety Analysis Report (UFSAR) analyzed accident conditions.

The SW System UFSAR design analysis addresses the requirement to have three SW Pumps operable to support the recirculation phase, under blackout conditions, in the mitigation of a postulated Loss-Of-Coolant Accident (LOCA). This criteria ensures two SW loops are available to meet the system redundancy criteria. Additionally, the UFSAR states that a minimum of two (2) operable SW Pumps are required to provide sufficient flow to vital equipment to support the recirculation phase under blackout conditions. A minimum of three pumps must be operable to su1)port "single failure" criteria.

LICENSEE EVENT REPORT . ( LER) TEXT CONTINUA '.'lON Salem Generating Station DOCKET NUMBER LER NUMBER PAGE Unit 2 5000311- - - - - - -

89-001-00

---- 4 of 4 The SEC System {JEI is comprised of three trains (A, B, and C). The system determines the need for accident and/or blackout safety equipment and loads this equipment onto the corresponding Vital Bus.

The SEC Auto Test Feature provides continual surveillance of the SEC operation from the logic input signals through the logic and counter

~tages and up to and including the relay driver outputs. The continual surveillance does not interfere with system requirements, nor cause any output relay actuation during normal system operation.

Although the SEC Auto Test Feature is identified in the Updated Final Safety Analysis Report (UFSAR}, it is not taken credit for; it is an enhancement for ensuring continued operability of the SEC. Also, it is not identified as part of the Technical Specification surveillance requirements.

When the SEC Auto Test Feature indicates a fault, it can mean a problem with the SEC logic. In the case addressed by this LER, investigation revealed that a circuit card had failed. Failure of this card could affect the load sequencing of various equipment under accident and/or blackout conditions.

With the possibility that only Nos. 21 and 24 SW Pumps operable under blackout conditions, a sinqle active failure could render one pump inoperable. Therefore, this event is reportable in accordance with.

Nuclear Regulatory Commission 10CFR 50.73(a) (2) (i) (B).

CORRECTIVE ACTION:

The 2C SEC chassis was replaced and tested successfully. Technical Specification Action Statement 3.0.3 was subsequently exited at 1535 hours0.0178 days 0.426 hours 0.00254 weeks 5.840675e-4 months on January 3, 1989.

Investigation of the No. 23 SW Pump low SW flow has been completed.

The pump wearing ring clearance has been adjusted. The pump was subsequently tested successfully.

General Manager -

Salem Operations MJP:pc SORC Mtg.89-005

e OPS~G Public Service Electric and Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 Salem Generating Station February l, 1989 U. S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555

Dear Sir:

SALEM GENERATING STATION LICENSE NO. DPR-75 DOCKET NO. 50-311 UNIT NO. 2 LICENSEE EVENT REPORT 89.-001-00 This Licensee Event Report is being submitted pursuant to the requirements of the Code of Federal Regulations 10CFR 50.73 (a) (2) (i) (B)~ This report is being submitted within ~hirty (30) days of discovery.

Sincerely yours,

0. /:** /!J.'7

~~-~IV L. K. Miller General Manager -

Salem Operations MJP:pc Distribution

ML18093B420

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Dear Sir:

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