Information Notice 1988-58, Potential Problems with Asea Brown Boveri ITE-51L Time-Overcurrent Relays: Difference between revisions

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{{#Wiki_filter:jUNITED STATESNUCLEAR REGULATORY COMMISSIONOFFICE OF NUCLEAR REACTOR REGULATIONWASHINGTON, D.C. 20555August 8, 1988NRC INFORMATION NOTICE NO. 88-58: POTENTIAL PROBLEMS WITH ASEA BROWN BOVERIITE-51L TIME-OVERCURRENT RELAYS
{{#Wiki_filter:j UNITED STATES NUCLEAR REGULATORY
 
COMMISSION
 
===OFFICE OF NUCLEAR REACTOR REGULATION===
WASHINGTON, D.C. 20555 August 8, 1988 NRC INFORMATION
 
NOTICE NO. 88-58: POTENTIAL
 
PROBLEMS WITH ASEA BROWN BOVERI ITE-51L TIME-OVERCURRENT
 
RELAYS


==Addressees==
==Addressees==
:All holders of operating licenses or construction permits for nuclear powerreactors.
:
All holders of operating
 
licenses or construction
 
permits for nuclear power reactors.


==Purpose==
==Purpose==
:This information notice is being provided to alert addressees to potentialproblems involving ASEA Brown Boveri ITE-51L time-overcurrent relays. Itis expected that recipients will review this information for applicabilityto their facilities and consider actions, as appropriate, to avoid similarproblems. However, suggestions contained in this information notice do notconstitute NRC requirements; therefore, no specific action or written responseis required.
: This information
 
notice is being provided to alert addressees
 
to potential problems involving
 
ASEA Brown Boveri ITE-51L time-overcurrent
 
relays. It is expected that recipients
 
will review this information
 
for applicability
 
to their facilities
 
and consider actions, as appropriate, to avoid similar problems.
 
However, suggestions
 
contained
 
in this information
 
notice do not constitute
 
NRC requirements;  
therefore, no specific action or written response is required.Description
 
of Circumstances:
Several spurious actuations
 
of ASEA Brown Boveri (ABB) ITE-51L relays have occurred at the Beaver Valley nuclear power plant. These actuations
 
resulted in unnecessary
 
interruptions
 
of the electrical
 
power supply to safety-related
 
equipment.
 
The ITE-51L relays monitor circuit current. When the magnitude of the current exceeds a reference
 
value for a specific duration, the relay actuates to energize the circuit breaker's
 
trip coil. The licensee has determined
 
that the spurious relay actuations
 
were caused by faulty silicon-controlled
 
rectifiers (SCRs) that were manufactured
 
by the Motorola Company.SCRs are solid-state
 
devices that are used as electronic
 
switches in electrical
 
circuits.
 
When a voltage is applied across the terminals
 
of the SCR, the device is designed to allow current to flow only when 'gated" or switched on by the proper electrical
 
signal. The SCRs that failed at Beaver Valley allowed cur-rent to flow in the absence of the proper gating signal. These "leakage" currents were of sufficient
 
magnitude
 
to energize the trip coil of the as-sociated circuit breaker.The licensee was informed by Motorola that SCRs manufactured
 
between the late 1970s and early 1980s are susceptible
 
to this mode of failure and that these SCRs are likely to fail within the first 2 years of service. Since 1982, all SCRs manufactured
 
by Motorola have been subjected
 
to a "burn-in" test. In this test, the SCRs are placed in a high-temperature
 
environment
 
both with and with-'out voltage applied. SCRs that pass this test are expected to perform normally for an extended period.88080200
IN 88-58 August 8, 1988 Beaver Valley Unit 2 has approximately
 
105 ITE-S5L relays installed
 
in safety-related applications, and Unit i has 10. The licensee is testing all the relays in Units 1 and 2 to determine
 
whether the SCRs are faulty.No specific action or written response is required by this information
 
If you have any questions
 
about this matter, please contact one of the contacts listed below or the Regional Administrator
 
of the appropriate
 
office.notice.technical regional Charles E. Rossi, Director Division of Operational
 
===Events Assessment===
Office of Nuclear Reactor Regulation
 
K. R. Naidu, NRR (301) 492-0980 Technical
 
Contacts: N. E. Fields, NRR (301) 492-1173 Attachment:
List of Recently Issued NRC Information
 
Notices S
 
Attachment
 
IN 88-58 August 8, 1988 LIST OF RECENTLY ISSUED NRC INFORMATION
 
NOTICES Information
 
Date of Notice No. Subject Issuance Issued to 88-57 88-56 88-55 88-54 Potential
 
Loss of Safe Shutdown Equipment
 
Due to Premature
 
===Silicon Controlled===
Rectifier
 
Failure Potential
 
Problems with Silicone Foam Fire Barrier Penetration
 
Seals Potential
 
Problems Caused by Single Failure of an Engineered
 
Safety Feature Swing Bus Failure of Circuit Breaker Following
 
Installation
 
of Amptector
 
===Direct Trip Attachment===
Licensee Violations
 
of NRC Regulations, Which Led to Medical Diagnostic
 
===Misadministrations===
Failure of Intrauterine
 
Tandem of Fletcher Applicator
 
===Brachytherapy===
Devices During Patient Treatment 8/8/88 8/4/88 8/3/88 7/28/88 7/28/88 7/27/88 All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for nuclear power reactors.All manufacturers
 
and distributors
 
of radio-pharmaceuticals
 
for human use, nuclear pharmacies, and medical licensees.
 
Medical licensees.
 
88-53 88-52 88-46, Supplement
 
1 Licensee Report of Defective
 
Refurbished
 
Circuit Breakers 7/26/88 All holders of OLs or CPs for nuclear power reactors.88-51 Failures of Main Steam Isolation
 
Valves 7/21/88 All holders of OLs or CPs for nuclear power reactors.OL = Operating
 
License CP = Construction
 
Permit
 
IN 88-58 August 8, 1988 Beaver Valley Unit 2 has approximately
 
105 ITE-51L relays installed
 
in safety-related applications, and Unit 1 has 10. The licensee is testing all the relays in Units 1 and 2 to determine
 
whether the SCRs are faulty.No specific action or written response is required by this information
 
If you have any questions
 
about this matter, please contact one of the contacts listed below or the Regional Administrator
 
of the appropriate
 
office.notice.technical regional Charles E. Rossi, Director Division of Operational
 
===Events Assessment===
Office of Nuclear Reactor Regulation
 
Technical
 
Contacts: K. R. Naidu, NRR (301) 492-0980 N. E.(301)Fields, NRR 492-1173 Attachment:
List of Recently Issued NRC Information
 
Notices*see previous concurrence
 
EAB:NRR El KNaidu* N1 7/18/88 7/*C:GCB:NRR
 
CHBerlinger
 
8/1/88 kB:NRR Fields*/14/88 EAB:NRR DFischer*BCj
 
re*7/19/88 NRR:RVIB EBaker*7/19/88 VIB:NRR WBrach*7/20/88 AD:DRIS BGrimes*7/22/88 C:EAB:NRR WLanning*8/2/88*D:DEST LShao 7/29/88'V/3/88 IN 88-July , 1988 Beaver Valley Unit 2 has approximately
 
105 ITE-51L relays installed
 
in safety-related applications, and Unit 1 has 10. The licensee is testing all the relays in Units 1 and 2 to determine
 
whether the SCRs are faulty.No specific action or written response is required by this information
 
notice.If you have any questions
 
about this matter, please contact the technical contacts listed below or the regional administrator
 
of the appropriate
 
regional office.Charles E. Rossi, Director Division of Operational
 
===Events Assessment===
Office of Nuclear Reactor Regulation
 
Technical
 
Contact: K. R. Naidu (301) 492-0980 N. E. Fields, NRR (301) 492-1173 Attachment:
List of Recently Issued NRC Information
 
Notices*see previous concurrence
 
EAB:NRR EAB:NRR EAB:NRR H: KNaidu
 
* NFields* DFischer*BC
 
&re*/ /88 / /88 / /88 C:G S d--R D: D:DOEA:NRR
 
CHBerlinger
 
LShao CERossi (/* /88 1 / /8 8/ /88 NRR:RVIB EBaker/ /88 VIB:NRR WBrach*/ /88 AD:DRIS BGrimes*/ /88'ink C:EAB:NRR WLanning r/ 2 /88 IN 88-July , 1988 Beaver Valley Unit 2 has approximately
 
one hundred and five ITE-51L type relays installed
 
in safety-related
 
applications.
 
Unit 1 has ten of the faulty relays in safety related applications.
 
The licensee is in the process of testing all the relays in Units 1 and 2 to determine
 
whether the SCRs are faulty.No specific action or written response is required by this information
 
notice.If you have any questions
 
about this matter, please contact the technical contact listed below or the Regional Administrator
 
of the appropriate


==Description of Circumstances==
regional office.Charles E. Rossi. Director Division of Operational
:Several spurious actuations of ASEA Brown Boveri (ABB) ITE-51L relays haveoccurred at the Beaver Valley nuclear power plant. These actuations resultedin unnecessary interruptions of the electrical power supply to safety-relatedequipment. The ITE-51L relays monitor circuit current. When the magnitudeof the current exceeds a reference value for a specific duration, the relayactuates to energize the circuit breaker's trip coil. The licensee hasdetermined that the spurious relay actuations were caused by faulty silicon-controlled rectifiers (SCRs) that were manufactured by the Motorola Company.SCRs are solid-state devices that are used as electronic switches in electricalcircuits. When a voltage is applied across the terminals of the SCR, the deviceis designed to allow current to flow only when 'gated" or switched on by theproper electrical signal. The SCRs that failed at Beaver Valley allowed cur-rent to flow in the absence of the proper gating signal. These "leakage"currents were of sufficient magnitude to energize the trip coil of the as-sociated circuit breaker.The licensee was informed by Motorola that SCRs manufactured between the late1970s and early 1980s are susceptible to this mode of failure and that theseSCRs are likely to fail within the first 2 years of service. Since 1982, allSCRs manufactured by Motorola have been subjected to a "burn-in" test. In thistest, the SCRs are placed in a high-temperature environment both with and with-'out voltage applied. SCRs that pass this test are expected to perform normallyfor an extended period.88080200
IN 88-58August 8, 1988 Beaver Valley Unit 2 has approximately 105 ITE-S5L relays installed in safety-related applications, and Unit i has 10. The licensee is testing all the relaysin Units 1 and 2 to determine whether the SCRs are faulty.No specific action or written response is required by this informationIf you have any questions about this matter, please contact one of thecontacts listed below or the Regional Administrator of the appropriateoffice.notice.technicalregionalCharles E. Rossi, DirectorDivision of Operational Events AssessmentOffice of Nuclear Reactor RegulationK. R. Naidu, NRR(301) 492-0980Technical Contacts:N. E. Fields, NRR(301) 492-1173Attachment: List of Recently Issued NRC Information NoticesS


AttachmentIN 88-58August 8, 1988 LIST OF RECENTLY ISSUEDNRC INFORMATION NOTICESInformation Date ofNotice No. Subject Issuance Issued to88-5788-5688-5588-54Potential Loss of SafeShutdown Equipment Due toPremature Silicon ControlledRectifier FailurePotential Problems withSilicone Foam Fire BarrierPenetration SealsPotential Problems Causedby Single Failure of anEngineered Safety FeatureSwing BusFailure of Circuit BreakerFollowing Installation ofAmptector Direct TripAttachmentLicensee Violations of NRCRegulations, Which Led toMedical DiagnosticMisadministrationsFailure of IntrauterineTandem of FletcherApplicator BrachytherapyDevices During PatientTreatment8/8/888/4/888/3/887/28/887/28/887/27/88All holders of OLsor CPs for nuclearpower reactors.All holders of OLsor CPs for nuclearpower reactors.All holders of OLsor CPs for nuclearpower reactors.All holders of OLsor CPs for nuclearpower reactors.All manufacturers anddistributors of radio-pharmaceuticals forhuman use, nuclearpharmacies, andmedical licensees.Medical licensees.88-5388-5288-46,Supplement 1Licensee Report ofDefective RefurbishedCircuit Breakers7/26/88All holders of OLsor CPs for nuclearpower reactors.88-51Failures of Main SteamIsolation Valves7/21/88All holders of OLsor CPs for nuclearpower reactors.OL = Operating LicenseCP = Construction Permit
===Events Assessment===
Office of Nuclear Reactor Regulation


IN 88-58August 8, 1988 Beaver Valley Unit 2 has approximately 105 ITE-51L relays installed in safety-related applications, and Unit 1 has 10. The licensee is testing all the relaysin Units 1 and 2 to determine whether the SCRs are faulty.No specific action or written response is required by this informationIf you have any questions about this matter, please contact one of thecontacts listed below or the Regional Administrator of the appropriateoffice.notice.technicalregionalCharles E. Rossi, DirectorDivision of Operational Events AssessmentOffice of Nuclear Reactor RegulationTechnical Contacts:K. R. Naidu, NRR(301) 492-0980N. E.(301)Fields, NRR492-1173Attachment:List of Recently Issued NRC Information Notices*see previous concurrenceEAB:NRR ElKNaidu* N17/18/88 7/*C:GCB:NRRCHBerlinger8/1/88kB:NRRFields*/14/88EAB:NRRDFischer*BCj re*7/19/88NRR:RVIBEBaker*7/19/88VIB:NRRWBrach*7/20/88AD:DRISBGrimes*7/22/88C:EAB:NRRWLanning*8/2/88*D:DESTLShao7/29/88'V/3/88 IN 88-July , 1988 Beaver Valley Unit 2 has approximately 105 ITE-51L relays installed in safety-related applications, and Unit 1 has 10. The licensee is testing all the relaysin Units 1 and 2 to determine whether the SCRs are faulty.No specific action or written response is required by this information notice.If you have any questions about this matter, please contact the technicalcontacts listed below or the regional administrator of the appropriate regionaloffice.Charles E. Rossi, DirectorDivision of Operational Events AssessmentOffice of Nuclear Reactor Regulation
Technical


===Technical Contact:===
Contact: K. R.(301)Naidu 492-0980 N. E. Fields, NRR (301) 492-1173 Attachment:  
K. R. Naidu(301) 492-0980N. E. Fields, NRR(301) 492-1173Attachment: List of Recently Issued NRC Information Notices*see previous concurrenceEAB:NRR EAB:NRR EAB:NRR H:KNaidu
List of Recently Issued NRC Information


* NFields* DFischer*BC &re*/ /88 / /88 / /88C:G S d--R D: D:DOEA:NRRCHBerlinger LShao CERossi(/* /88 1 / /88/ /88NRR:RVIBEBaker/ /88VIB:NRRWBrach*/ /88AD:DRISBGrimes*/ /88'inkC:EAB:NRRWLanningr/ 2 /88 IN 88-July , 1988 Beaver Valley Unit 2 has approximately one hundred and five ITE-51L typerelays installed in safety-related applications. Unit 1 has ten of the faultyrelays in safety related applications. The licensee is in the process oftesting all the relays in Units 1 and 2 to determine whether the SCRs arefaulty.No specific action or written response is required by this information notice.If you have any questions about this matter, please contact the technicalcontact listed below or the Regional Administrator of the appropriate regionaloffice.Charles E. Rossi. DirectorDivision of Operational Events AssessmentOffice of Nuclear Reactor Regulation
Notices EAB: 1RR KNa i du 7 /A/88 EAB:N1 NFieli 7//1 l RR &XAB R T2 ds DFischer aS 7//1/88 8 4G 3/p/ W TRR:RVIB EBaker 7 /A/88 r -1 1) Y- -/4 -j'Vz'X, C:EAB:NRR WLanning/ /88 C:GCB:NRR CHBerlinger


===Technical Contact:===
/ /88 u:IMUEA:NRR
K. R.(301)Naidu492-0980N. E. Fields, NRR(301) 492-1173Attachment: List of Recently Issued NRC Information NoticesEAB: 1RRKNa i du7 /A/88EAB:N1NFieli7//1 lRR &XAB R T2ds DFischeraS 7//1/88 84G3/p/ WTRR:RVIBEBaker7 /A/88r -11) Y- -/4 -j'Vz'X,C:EAB:NRRWLanning/ /88C:GCB:NRRCHBerlinger/ /88u:IMUEA:NRRWRossi/ /88Ra


}}
WRossi/ /88 Ra}}


{{Information notice-Nav}}
{{Information notice-Nav}}

Revision as of 12:39, 31 August 2018

Potential Problems with Asea Brown Boveri ITE-51L Time-Overcurrent Relays
ML031150022
Person / Time
Site: Beaver Valley, Millstone, Hatch, Monticello, Calvert Cliffs, Dresden, Davis Besse, Peach Bottom, Browns Ferry, Salem, Oconee, Mcguire, Nine Mile Point, Palisades, Palo Verde, Perry, Indian Point, Fermi, Kewaunee, Catawba, Harris, Wolf Creek, Saint Lucie, Point Beach, Oyster Creek, Watts Bar, Hope Creek, Grand Gulf, Cooper, Sequoyah, Byron, Pilgrim, Arkansas Nuclear, Braidwood, Susquehanna, Summer, Prairie Island, Columbia, Seabrook, Brunswick, Surry, Limerick, North Anna, Turkey Point, River Bend, Vermont Yankee, Crystal River, Haddam Neck, Ginna, Diablo Canyon, Callaway, Vogtle, Waterford, Duane Arnold, Farley, Robinson, Clinton, South Texas, San Onofre, Cook, Comanche Peak, Yankee Rowe, Maine Yankee, Quad Cities, Humboldt Bay, La Crosse, Big Rock Point, Rancho Seco, Zion, Midland, Bellefonte, Fort Calhoun, FitzPatrick, McGuire, LaSalle, 05000000, Zimmer, Fort Saint Vrain, Shoreham, Satsop, Trojan, Atlantic Nuclear Power Plant, Crane
Issue date: 08/08/1988
From: Rossi C E
Office of Nuclear Reactor Regulation
To:
References
IN-88-058, NUDOCS 8808020102
Download: ML031150022 (6)
v • d • e


j UNITED STATES NUCLEAR REGULATORY

COMMISSION

OFFICE OF NUCLEAR REACTOR REGULATION

WASHINGTON, D.C. 20555 August 8, 1988 NRC INFORMATION

NOTICE NO. 88-58: POTENTIAL

PROBLEMS WITH ASEA BROWN BOVERI ITE-51L TIME-OVERCURRENT

RELAYS

Addressees

All holders of operating

licenses or construction

permits for nuclear power reactors.

Purpose

This information

notice is being provided to alert addressees

to potential problems involving

ASEA Brown Boveri ITE-51L time-overcurrent

relays. It is expected that recipients

will review this information

for applicability

to their facilities

and consider actions, as appropriate, to avoid similar problems.

However, suggestions

contained

in this information

notice do not constitute

NRC requirements;

therefore, no specific action or written response is required.Description

of Circumstances:

Several spurious actuations

of ASEA Brown Boveri (ABB) ITE-51L relays have occurred at the Beaver Valley nuclear power plant. These actuations

resulted in unnecessary

interruptions

of the electrical

power supply to safety-related

equipment.

The ITE-51L relays monitor circuit current. When the magnitude of the current exceeds a reference

value for a specific duration, the relay actuates to energize the circuit breaker's

trip coil. The licensee has determined

that the spurious relay actuations

were caused by faulty silicon-controlled

rectifiers (SCRs) that were manufactured

by the Motorola Company.SCRs are solid-state

devices that are used as electronic

switches in electrical

circuits.

When a voltage is applied across the terminals

of the SCR, the device is designed to allow current to flow only when 'gated" or switched on by the proper electrical

signal. The SCRs that failed at Beaver Valley allowed cur-rent to flow in the absence of the proper gating signal. These "leakage" currents were of sufficient

magnitude

to energize the trip coil of the as-sociated circuit breaker.The licensee was informed by Motorola that SCRs manufactured

between the late 1970s and early 1980s are susceptible

to this mode of failure and that these SCRs are likely to fail within the first 2 years of service. Since 1982, all SCRs manufactured

by Motorola have been subjected

to a "burn-in" test. In this test, the SCRs are placed in a high-temperature

environment

both with and with-'out voltage applied. SCRs that pass this test are expected to perform normally for an extended period.88080200

IN 88-58 August 8, 1988 Beaver Valley Unit 2 has approximately

105 ITE-S5L relays installed

in safety-related applications, and Unit i has 10. The licensee is testing all the relays in Units 1 and 2 to determine

whether the SCRs are faulty.No specific action or written response is required by this information

If you have any questions

about this matter, please contact one of the contacts listed below or the Regional Administrator

of the appropriate

office.notice.technical regional Charles E. Rossi, Director Division of Operational

Events Assessment

Office of Nuclear Reactor Regulation

K. R. Naidu, NRR (301) 492-0980 Technical

Contacts: N. E. Fields, NRR (301) 492-1173 Attachment:

List of Recently Issued NRC Information

Notices S

Attachment

IN 88-58 August 8, 1988 LIST OF RECENTLY ISSUED NRC INFORMATION

NOTICES Information

Date of Notice No. Subject Issuance Issued to 88-57 88-56 88-55 88-54 Potential

Loss of Safe Shutdown Equipment

Due to Premature

Silicon Controlled

Rectifier

Failure Potential

Problems with Silicone Foam Fire Barrier Penetration

Seals Potential

Problems Caused by Single Failure of an Engineered

Safety Feature Swing Bus Failure of Circuit Breaker Following

Installation

of Amptector

Direct Trip Attachment

Licensee Violations

of NRC Regulations, Which Led to Medical Diagnostic

Misadministrations

Failure of Intrauterine

Tandem of Fletcher Applicator

Brachytherapy

Devices During Patient Treatment 8/8/88 8/4/88 8/3/88 7/28/88 7/28/88 7/27/88 All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for nuclear power reactors.All holders of OLs or CPs for nuclear power reactors.All manufacturers

and distributors

of radio-pharmaceuticals

for human use, nuclear pharmacies, and medical licensees.

Medical licensees.

88-53 88-52 88-46, Supplement

1 Licensee Report of Defective

Refurbished

Circuit Breakers 7/26/88 All holders of OLs or CPs for nuclear power reactors.88-51 Failures of Main Steam Isolation

Valves 7/21/88 All holders of OLs or CPs for nuclear power reactors.OL = Operating

License CP = Construction

Permit

IN 88-58 August 8, 1988 Beaver Valley Unit 2 has approximately

105 ITE-51L relays installed

in safety-related applications, and Unit 1 has 10. The licensee is testing all the relays in Units 1 and 2 to determine

whether the SCRs are faulty.No specific action or written response is required by this information

If you have any questions

about this matter, please contact one of the contacts listed below or the Regional Administrator

of the appropriate

office.notice.technical regional Charles E. Rossi, Director Division of Operational

Events Assessment

Office of Nuclear Reactor Regulation

Technical

Contacts: K. R. Naidu, NRR (301) 492-0980 N. E.(301)Fields, NRR 492-1173 Attachment:

List of Recently Issued NRC Information

Notices*see previous concurrence

EAB:NRR El KNaidu* N1 7/18/88 7/*C:GCB:NRR

CHBerlinger

8/1/88 kB:NRR Fields*/14/88 EAB:NRR DFischer*BCj

re*7/19/88 NRR:RVIB EBaker*7/19/88 VIB:NRR WBrach*7/20/88 AD:DRIS BGrimes*7/22/88 C:EAB:NRR WLanning*8/2/88*D:DEST LShao 7/29/88'V/3/88 IN 88-July , 1988 Beaver Valley Unit 2 has approximately

105 ITE-51L relays installed

in safety-related applications, and Unit 1 has 10. The licensee is testing all the relays in Units 1 and 2 to determine

whether the SCRs are faulty.No specific action or written response is required by this information

notice.If you have any questions

about this matter, please contact the technical contacts listed below or the regional administrator

of the appropriate

regional office.Charles E. Rossi, Director Division of Operational

Events Assessment

Office of Nuclear Reactor Regulation

Technical

Contact: K. R. Naidu (301) 492-0980 N. E. Fields, NRR (301) 492-1173 Attachment:

List of Recently Issued NRC Information

Notices*see previous concurrence

EAB:NRR EAB:NRR EAB:NRR H: KNaidu

  • NFields* DFischer*BC

&re*/ /88 / /88 / /88 C:G S d--R D: D:DOEA:NRR

CHBerlinger

LShao CERossi (/* /88 1 / /8 8/ /88 NRR:RVIB EBaker/ /88 VIB:NRR WBrach*/ /88 AD:DRIS BGrimes*/ /88'ink C:EAB:NRR WLanning r/ 2 /88 IN 88-July , 1988 Beaver Valley Unit 2 has approximately

one hundred and five ITE-51L type relays installed

in safety-related

applications.

Unit 1 has ten of the faulty relays in safety related applications.

The licensee is in the process of testing all the relays in Units 1 and 2 to determine

whether the SCRs are faulty.No specific action or written response is required by this information

notice.If you have any questions

about this matter, please contact the technical contact listed below or the Regional Administrator

of the appropriate

regional office.Charles E. Rossi. Director Division of Operational

Events Assessment

Office of Nuclear Reactor Regulation

Technical

Contact: K. R.(301)Naidu 492-0980 N. E. Fields, NRR (301) 492-1173 Attachment:

List of Recently Issued NRC Information

Notices EAB: 1RR KNa i du 7 /A/88 EAB:N1 NFieli 7//1 l RR &XAB R T2 ds DFischer aS 7//1/88 8 4G 3/p/ W TRR:RVIB EBaker 7 /A/88 r -1 1) Y- -/4 -j'Vz'X, C:EAB:NRR WLanning/ /88 C:GCB:NRR CHBerlinger

/ /88 u:IMUEA:NRR

WRossi/ /88 Ra


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