05000219/LER-1982-013, Forwards LER 82-013/03L-0.Detailed Event Analysis Encl

Forwards LER 82-013/03L-0.Detailed Event Analysis Encl

ML20050D890
Person / Time
Site:	Oyster Creek
Issue date:	03/29/1982
From:	Fiedler P GENERAL PUBLIC UTILITIES CORP.
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20050D891	List: 05000219/LER-1982-013, Forwards LER 82-013/03L-0.Detailed Event Analysis Encl 05000219/LER-1982-013-03, /03L-0:on 820128,low Voltage Annunciator Relay Setting for Main Station Batteries B & C & Diesel Generator 2 Battery Relay & Setting Found Below Tech Specs Limit. Caused by Annunciation Setpoints Out of Spec
References
NUDOCS 8204120418
Download: ML20050D890 (4)

LER-1982-013, Forwards LER 82-013/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
2191982013R00 - NRC Website

text

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GPU Nuclear g

gg P O. Box 388 Forked River, New Jersey 08731 609-693 6000 Writer's Direct Dial Number:

March 29, 1982 4

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Mr. Ronald C. Haynes, Adnunistrator e

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NECg 'ED United States Nuclear Regulatory Cmmission g

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Dear Mr. Ilaynes:

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Subject: Oyster Creek Nuclear Generating Station Docket No. 50-219 6

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Licensee Event Report Ibportable Occurrence No. 50-219/82-13/03L This letter forwards three copies of a Licensee Event Report to report Re-portable Occurrence No. 50-219/82-13/03L in cmpliance with paragraph 6.9.2.b.1 of the Technical Specifications.

It is recognized that due to various adnunistrative delays the subnittal of this Reportable Occurrence is not in accordance with the time limitation specified in paragraph 6.9.2.b. of the Technical Specifications.

Very truly yours, Peter B. Fiedler Vice President and Director Oyster Creek PDF:kdk Enclosures cc: Director (40)

Office of Inspection and Enforement U. S. Nuclear Regulatore Ca mission Washington, D. C.

20555 Director (3)

Office of Management Information and Progran Control U. S. Nuclear Regulatory Ca mission Washington, D. C.

20555 NIC Resident Inspector (1)

Oyster Creek Nuclear Cenerating Statian Fbrked River, N. J.

08731 8204120418 820329 wral Pubhc Utiht'es System L

PDR ADOCK 05000219

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4 OYSTER CREEK NLCIEAR GENERATING STATION Fbrked River, New Jersey 08731 i

Ideenseo Event Report Reportable Occurrence No. 50-219/82-13/03L Report Date i

March 29, 1982 Occurrence Date i

January 28, 1982 Identification of Occurrence During surveillance testing of the low voltage annunciator relay settings for the Main Station Batteries B and C and Diesel Generator No. 2 Battery, relay settings were found outside the limits allowed by Tedinical Specifications, paragraph 4.7.B.3.b.

'Ihis event is considered to be a reportable occurrence as defined in the Tech-i nical Specifications, paragraph 6.9.2.b.l.

Conditions Prior to Occurrence t

'Ihe plant was in the cold shutdown mode with reactor coolant tmperature less than 212 F and the reactor vented.

i Description of Occurrence Surveillance testing revealed that the low voltage annunciation reset and ini-l tlation setpoints were outside the Technical Specifications limits. 'Ihe fol-lowing are the subject test datat Iow Voltage Annunciation Relay For Battery Main Station Diesel Generator B

C (Battery Charger)

Cl C2 1

2 Tech Spec Limits (VDC):

- Pick-Up (Reset) 125tl 125il 125il

- Drop-Out (Setpoint) ll5tl 11511 115 1 112 1 112 1 As Ebund (VDC):

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- Pick-Up (Reset) 123.9 125.3 125.0 121.3 121.5

- Drop-Out (Setpoint) 117.8 114.3 111.2 111.3 113.4 As Inf t (VDC) :

- Pick-Up (Reset) 125.0 125.3 125.0 119.5 119.9

- DroIH)ut (Setpoint) 115.1 115.1 115.0 112.5 112.2

• Limits not specified in 'Ibchnical Specifications. liowever, the Surveillance Procedure acceptance criteria limits pick-up voltage to 12011 volt DC.

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1 Reportable Occurrence Page 2 Report Ib. 50-219/82-13/03L Apparent Cause of Occurrence The cause is attributed to this being the first surveillance test performed on these devices.

Analysis of Occurrence Main Station Batteries:

j The plant has two safety-related Main Station Batteries, namely B and C.

Bat-teries B and C are the redundant Class IE power sources. The Technical Spe-cifications for Im Voltage Annunciation (LVA) were revised in August 1981.

Previously, the low voltage annunciators had not been required to be surveil-lance tested and were set to manufacturer's reconmended settings, which vary slightly fran the setpoints which were incorporated into Technical Specifica-tions.

'Ihe above surveillance test data indicates that the LVA setpoint for the B battery was found out of specification in a conservative direction while the reset point ms found in a nonconservative direction. Once the alarm (LVA) i is reset at a desired high voltage, it does not play any roll in the LVA.

Ilence, the safety significance of the reset point being in a nonconservative direction is considered minimal. For the C battery, there are two battery chartjers, C1 and C2.

The surveillance test data indicates that the LVA set-point for the C2 battery charger was found out of specification in a non-conservative direction, liowever, the C battery was on float charge and was fully operable according to the weekly battery surveillances.

In addition, the B battery was available which is redundant to C battery. 'Iherefore, the safety significance of the C2 battery charger setpoint being out of specifi-cation is considered minimal.

Diesel Generator (DG) Batteries:

'Ihe Im Voltage Annunciation initiation setpoint for DG-2 battery was found out of specification in a conservative direction. As a result, the safety significance is also considered minimal.

Corrective Action

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All alarm relays were reset to the value required within tolerances specified in the Technical Specifications.

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Reportable Occurrence Page 3 Report tb. 50-219/82-13/03L Failure Data Battery IIM Voltage Annunciation Relay Make/Model No.

B (Main Station)

Exide Voltage Pelay/ Type No. 101085501 C (Main Station)

The relay tunenclature is DSLV included in the battery

- Battery Charger C2 charger furnished by Power Conversion Products, Inc./

Battery Charger tbdel #3S-130-500CE DG-2 Exide/LVR Card #101085512F VDC DO 105 lbte: None of the relays above were considered " Failed".