Information Notice 1995-22, Hardened or Contaminated Lubricant Cause Metal-Clad Circuit Breaker Failures

Hardened or Contaminated Lubricant Cause Metal-Clad Circuit Breaker Failures

ML031060206
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, Three Mile Island, 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, Fort Saint Vrain, Shoreham, Satsop, Trojan, Atlantic Nuclear Power Plant
Issue date:	04/21/1995
From:	Grimes B Office of Nuclear Reactor Regulation
To:
References
IN-95-022, NUDOCS 9504180073
Download: ML031060206 (13)

UNITED STATES NUCLEAR REGULATORY

COMMISSION

OFFICE OF NUCLEAR REACTOR REGULATION

WASHINGTON, D.C. 20555 April 21, 1995 NRC INFORMATION

NOTICE 95-22: HARDENED OR CONTAMINATED

LUBRICANTS

CAUSE METAL-CLAD

CIRCUIT BREAKER FAILURES

Addressees

All holders of operating

licenses or construction

permits for nuclear power reactors.

Purpose

The U.S. Nuclear Regulatory

Commission (NRC) is issuing this information

notice to alert addressees

to problems that could result from failing to periodically

check the condition

of lubricants

that may become hardened or contain contaminants

used in HK series (4-kV and 6.9-kV) and K-Line (600-V)circuit breakers manufactured

by Asea Brown Boveri (ABB, formerly ITE) and DB-50 (480-V) breakers manufactured

by Westinghouse.

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 are not NRC requirements;

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

of Circumstances

Hardened Grease in Breaker Operating

Mechanisms

On October 4, 1988, during surveillance

testing of the low-pressure

core spray pump at River Bend, Unit 1, the safety-related

ABB HK 4-kV circuit breaker failed to close after the closing circuit was energized

from the control room.The failure was attributed

to breaker linkage grease that had solidified

with age, thus causing the closing mechanism

to bind.On February 8, 1989, during post maintenance

testing at D.C. Cook, Unit 1, an ABB HK 4-kV breaker failed to close after the closing circuit was energized.

On February 27, 1989, another HK breaker failed to close during a test. Both failures were attributed

to hardened grease that caused the operating mechanism

to bind. Seven additional

HK series breakers used in safety-related

and balance-of-plant

applications

also failed in this manner. The breakers were 17 years old and had been inspected

and serviced several times. However, the revision of the vendor manual in use and, consequently, licensee procedures

did not state the need to disassemble, clean or relubricate

the operating

mechanism

on a periodic basis, except when grease is found to be"contaminated" or when parts are replaced (see NRC Inspection

Report 50-315/89031 for additional

information).

RDiR :j4E JS en ce. SSOQ2S 95(YjS/9504180073 dr<F0S At0

IN 95-22 April 21, 1995 During an October 1992 surveillance

test at LaSalle, Unit 1, an ABB HK 4-kY reactor recirculation

pump breaker failed to trip. The failure was attributed

to hardened grease in the operating

mechanism.

In October 1993, during a Unit 2 refueling

outage, a nonsafety-related

ABB HK 4-kY pump breaker failed to close. This failure also was attributed

to hardened operating

mechanism grease. The licensee breaker maintenance

procedures

did not require inspection (other than visual), disassembly, or relubrication

of the breaker operating

mechanism

on a periodic basis (see NRC Inspection

Report 50-373/93031 for additional

information).

Contamination

of Grease on Sliding Electrical

Parts On November 5, 1989, during surveillance

testing at D.C. Cook, a Westinghouse

DB-50 480-V "B" train reactor trip bypass breaker failed to close electrically

because of high resistance

in the auxiliary

contacts that were part of the closing circuit. The high resistance

may have resulted from contamination

of the conductive

graphite grease prescribed

by the vendor manual. The revision of the Westinghouse

instruction

manual in use at D.C. Cook did not contain a recommendation

for periodically

replacing

the graphite grease or checking its condition (e.g., by measuring

contact resistance).

However, recent guidance issued by the vendor provided for such checking and replacement, as required.Discussion

The ABB HK breakers failed because lubricating

grease solidified

with age in the breaker operating

mechanisms.

As the grease hardened, friction increased in the metal-to-metal

contact areas. The additional

metal friction, as well as some interference

from hardened grease deposits, caused the mechanism

to become increasingly

difficult

to operate freely, eventually

resulting

in failures of the breakers to open or close. The circuit breakers discussed above had been routinely

inspected

on numerous occasions.

However, while the licensees

adequately

verified cleanliness

in the visual inspections, they failed to identify lubricant

that was solidified

or contaminated.

Preventive

maintenance

activities

did not include periodic cleaning or disassembly

of the operating

mechanism

to determine

if the operating

mechanism

should be relubricated.

Until 1991, all the revisions

to the ITE/ABB HK and K-Line vendor manuals stated that breaker operating

mechanisms

were factory lubricated

and should not require additional

lubrication

during breaker service life. However, as early as 1972, ABB manuals, such as ITE HK Switchgear

Instruction

Book IB-8.2.7-1, and medium-voltage

switchgear

maintenance

and surveillance

manuals MS 3.2.1.9-IB (for HK) and MS 3.1.1.9-2B (for K-Line), did call for cleaning and relubrication

of the mechanism

with ANDEROL 757 grease (or NO-OX-ID grease for mating surfaces of moving, current-carrying

joints) should any lubricant be found contaminated

or when parts are replaced.In response to a 1989 10 CFR Part 21 report from D.C. Cook of mechanism binding due to hardened grease, ABB sent a letter to the NRC and all known affected licensees

or purchasers

of HK and K-Line breakers that described

the

K> ' IN 95-22 April 21, 1995 problem and recommended

solutions.

LaSalle, for example, had received this letter, yet had not updated procedures

to prevent the 1992 and 1993 failures.Other plants with the affected breakers included Perry, Comanche Peak, and Fermi. Comanche Peak had taken action to prevent these failures.In 1991, ABB issued revisions

to the HK and K-Line manuals that called for periodic (10-year)

cleaning and relubrication

of the operating

mechanism

with ANDEROL 757 and the mating surfaces of moving, current-carrying

joints with the NO-OX-ID, although mechanical

failures to operate have only been attributed

to hardened mechanism

lubricant.

In September

29 and October 3, 1994, letters to the NRC, ABB stated, on the basis of recent refurbishments, that the condition

of the mechanism

lubricant

cannot be determined

without complete disassembly

of the mechanism.

The October letter also cited failures of K3000 breakers as a result of hardened mechanism

lubricant, but stated that although failures of smaller K-Line breakers attributable

to hardened mechanism

grease had not been reported, some had operated sluggishly.

Repor-tedly, most of these breakers also have not been periodically

disassembled, cleaned, or relubricated

in service. In performing

post maintenance

testing, licensees

found no evidence of impending

breaker failures due to hardened grease because the tests were performed

primarily

to determine

whether the breaker tripped or closed.Unusual service conditions

such as high ambient temperatures, very dirty atmosphere

during construction

or outages or mixing of incompatible

greases were not specifically

identified

in the instances

cited. However, such conditions

accelerate

hardening

of mechanism

lubricants

and are conducive

to dirt or chemical contamination

and increased

electrical

resistance

of electrical

part lubricants.

Note that ESSO/Humble (now EXXON) NEBULA EP5F grease was used for these breakers prior to March 1972. After this date, new breaker mechanisms

were factory-lubricated

with ANDEROL 757. Manufacturers

have warned that old (or unidentified)

grease should be completely

removed before relubricating.

Although referring

to a different

type of circuit breaker, NRC IN 93-26,"Grease Solidification

Causes Molded-Case

Circuit Breaker Failure to Close," issued April 7, 1993, and its supplement

issued January 31, 1994, described

a similar problem. In addition, addressees

are reminded of commitments

made in response to the staff position in Generic Letter 90-03 and its Supplement

1, to maintain contact with certain key vendors (which include Class IE switchgear

vendors), in order to ensure that manuals (and equipment)

are kept up to date and the latest technical

information (including

10 CFR Part 21 reports and related correspondence)

is promptly obtained, evaluated

for applicability, and acted on, as appropriate.

Recommendations

for switchgear

maintenance

can also be found in owners group documents (e.g., the Westinghouse

Owners Group guidelines

on DB and DS breaker maintenance)

and industry guidance such as National Electrical

Manufacturers

Association (NEMA)publications, American National Standards

Institute/Institute

of Electrical

and Electronic

Engineers (ANSI/IEEE)

standards, and various Electric Power Research Institute (EPRI) reports such as NP-7410, "Breaker Maintenance."

-'~' IN 95-22 April 21, 1995 This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact one of the technical

contacts listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Project Support Office of Nuclear Reactor Regulation

Technical

contacts:

Rogelio Mendez, RIII (708) 829-9745 Stephen D. Alexander, NRR (301) 415-2995 Sikhindra

K. Mitra, NRR (301) 415-2783 Tirupataiah

Tella, RIII (708) 829-9749 Attachment:

List of Recently Issued NRC Information

Notices Le&la W

"Attachment

IN 95-22 April 21, 1995 LIST OF RECENTLY ISSUED NRC INFORMATION

NOTICES Information

Date of Notice No. Subject Issuance Issued to 95-21 94-64, Supp. 1 95-18, Supp. 1 95-20 95-19 95-18 Unexpected

Degradation

of Lead Storage Batteries Reactivity

Insertion Transient

and Accident Limits for High Burnup Fuel Potential

Pressure-Locking

of Safety-Related

Power-Operated Gate Valves Failures in Rosemount Pressure Transmitters

due to Hydrogen Per-meation into the Sensor Cell Failure of Reactor Trip Breaker to Open Because of Cutoff Switch Material Lodged in the Trip Latch Mechanism Potential

Pressure-Locking

of Safety-Related

Power-Operated Gate Valves Reactor Vessel Top Guide and Core Plate Cracking Vibration

Caused by Increased

Recirculation

Flow in a Boiling Water Reactor Inadequate

Logic Testing of Safety-Related

Circuits 04/20/95 04/06/95 03/31/95 03/22/95 03/22/95 03/15/95 03/10/95 03/09/95 03/07/95 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 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 boiling water reactors.All holders of OLs or CPs for boiling water reactors.All holders of OLs or CPs for nuclear power reactors.95-17 95-16 95-15 OL -Operating

License CP -Construction

Permit

I'~' IN 95-22 April 21, 1995 This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact one of the technical

contacts listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.orig /s/'d by CIGrimes Brian K. Grimes, Director Division of Project Support Office of Nuclear Reactor Regulation

Technical

contacts: Rogelio Mendez, RIII (708) 829-9745 Stephen D. Alexander, NRR (301) 415-2995 Sikhindra

K. Mitra, NRR (301) 415-2783 Tirupataiah

Tella, RIII (708) 829-9749 Attachment:

List of Recently Issued NRC Information

Notices* See EGGreenman

memorandum

to RLDennig dated June and previous concurrence

pages.DOCUMENT NAME: 95-22.IN----- at thL A....t I*.Alt. In tkhe bnx: 'C -CODY without enclosures "E" 15, 1994-CoDy with enclosures

ENS = No copy TO- ,-.IV[OFFICE Region III E Region III II E Region III E NAME TTella* RMendez* GGrant* EGGreenman*

DATE 09/07/94 06/10/94 06/10/94 06/13/94 OFFICE SIB/DOTS E TECH ED N SC:SIB DOTS E C:SIB/DOTS

E E D:DOTS:NRR

NAME SAlexander*

BCalure* GCwalina*

RGallo* RLSpessard*

DATE 01/03/95 12/29/94 01/03/95 101/06/95

101/06/95 OFFICE EELB/DE E C:EELB/DE

ECB:DOPS C:ECB/DOPS

L D-IDOPSI L NAME ISMitra* CBerlinger*

RKiessel AChaffee BKGrimeV)

I DATE 109/22/94

10/26/94 03/29/95 04/07/95 9 OFFICIAL RECORD COPY

IN 95-XX March 9, 1995 This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact one of the technical

contacts listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Project Support Office of Nuclear Reactor Regulation

Technical

contacts: Rogelio Mendez, Region III (708) 829-9745 Stephen D. Alexander, NRR (301) 415-2995 Sikhindra

K. Mitra, NRR (301) 415-2783 Tirupataiah

Tella, Region III (708) 829-9749 Attachment:

List of Recently Issued NRC Information

Notices* See EGGreenman

memorandum

to RLDennig dated June 15, 1994 and previous concurrence

pages.DOCUMENT NAME: BKRGRSE.SDA

To receive a conv of this document.

Indicate In the box: 'C" -Coov without enclosures

'E' = Copy with enclosures

'N" -No coDy OFFICE Region III E Region III E Region III E Regibn III I E NAME TTella* RMendez* GGrant* EGGreenman*

DATE 09/07/94 06/10/94 106/10/94

06/13/94 OFFICE SIB/DOTS E TECH ED N SC:SIB/DOTS

I E C:SIB/DOTS

E ]D:DOTS:NRRl

N NAME SAlexander*

BCalure* GCwalina*

IRGallo* RL pessard*DATE 01/03/95 12/29/94 101/03/95

101/06/95

101/06/95 OFFICE EELB/DE E C:EELB/DE

CB:DOPS ] C: ECUQP I D:DOPSl NAME SMitra* CBerlinger*

RKiesel AChatff-W

BKGrimesa-

• DATE 09/22/94 l 10/26/94 03/ E 95 1/J& 03/ /95 OFFICIAL RECORD COPY

IN 95-XX January 3, 1995 This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact one of the technical

contacts listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Project Support Office of Nuclear Reactor Regulation

Technical

contacts: Tirupataiah

Tella, Region III (708) 829-9749 Rogelio Mendez, Region III (708) 829-9745 Sikhindra

K. Mitra, NRR (301) 504-2783 Stephen D. Alexander, NRR (301) 504-2995 Attachment:

List of Recently Issued NRC Information

Notices* See EGGreenman

memorandum

to RLDennig dated June and previous concurrence

pages.DOCUMENT NAME: BKRGRSE.SDA

-- T -oa .&I .o xt-* l..At i., *ih. icy- ACEn CW withnoat Ancdloures

'F" 15, 1994' CoDY with enclosures

N -No copv o rU euvcive U cU Ps eB cge -Age. P --* -I-OFFICE Region III E Region III E Region III E Re ion III E ECB:DOPS NAME TTella* RMendez* GGrant* EGGreenman*

RKiesel DATE 09/07/94 06/10/94 06/10/94 06/13/94 01/ /95 OFFICE SIB/DOTS E TECH ED DTN SC;§IRDOTS

I Do:DOT§fIIRI

NAME SAlexander

v BCalure* Gftf i a R sard DATE 101/5/95 12/29/94 01/3 /95 6 '01/t' 95 OFFICE JEELB/DE I E C:EELB/DE

l Jj/RR C:ECB/DOPS

lI l D: NAME ISMitra CBerlinger

BWSheron AChaffee BKGrimes DATE J01/ /95 01/ /95 01/ /95 01/ /95 01/ /95 OFFICIAL RECORD COPY

IN 94-XX December 28, 1994 This informati

notice requires no specific action or written response.

If you have any que ions about the information

in this notice, please contact one of the technica contacts listed below or the appropriate

Office of Nuclear Reactor Regu tion (NRR) project manager.Brian K. Grimes, Director Division of Operating

Reactor Support Office of Nuclear Reactor Regulation

Technical

contact(s):

Tirupataiah

Tell Region III (708) 829-9749 Rogelio Mendez, Region II (708) 829-9745 Sikhindra

K. Mitra, NRR (301) 504-2703 Stephen D. Alexander, NRR (301) 504-2995 Attachments:

1. List of Recently Issued NRC Information

Notices* See EGGreenman

memorandum

to RLDennig dated June 15, 1994 and previous concurrence

pages.DOCUMFNT NAME! BKRGRSE.SDA

T7 --Ih. M-U M this .kndoummAnt- kIdiintm In the hox: 'C -CoDv without enclosures

WE'-Copy with enclosures

END -No copy OFFICE Region III E [Recion III I E lRegion III I E Reio III E j NAME TTella* RMendez* IGGrant* EGGreenman*

DATE 09/07/94 06/10/94 106/10/94

106/13/94 OFFICE OGCB NRR E ED [ EELB/NRR E C:ECB/DOPS

_DOPS NAME RKiesel* A , SMitra* CBerlinger*

BKGrimes DATE 09/07/94 12/A0/94 09/22/94 10/26/94 12/ /94 OFFICE D:DE/NRR E C:SIB/DOTS

I D/DOTS I l C:ECB/DOPS

D:DOPS NAME BWSheron*

RGallo RLSpessard

1 AChaffee BKGrimes DATE 11/01/94 12/ /94 12/ /94 112/ /94 12/ /94 OFFICIAL RECORD COPY

IN 94-XX December 28, 1994 This information

notice requires no specific action or written response.

If you have any questions

about the information

in this notice, please contact one of the technical

contacts listed below or the appropriate

Office of Nuclear Reactor Regulation (NRR) project manager.Brian K. Grimes, Director Division of Operating

Reactor Support Office of Nuclear Reactor Regulation

Technical

contact(s):

Tirupataiah

Tella, Region III (708) 829-9749 Rogelio Mendez, Region III (708) 829-9745 Sikhindra

K. Mltra, NRR (301) 504-2703 Stephen D. Alexander, NRR (301) 504-2995 Attachments:

1. List of Recently Issued NRC Information

Notices* See EGGreenman

memorandum

to RLDennig dated June and previous concurrence

pages. DOCUMENT NAME: As h .-4 dfj *A.-m'n Un thA hnV o C' -COnY without enclosures

'EW 15, 1994 NRCIN.471-CoDy with enclosures

'N' = No copy OFFICE *Region III *Region III *Region III *Region III NAME TTella RMendez GEGrant EGGreenman

DATE 9/ 7/94 6/10/94 6/10/94 6/13/94 OFFICE *OGCB/NRR

• Tech Ed *EELB/NRR

I*C:EELB/NRR

NAME RJKiessel

JMain JM SKMitra CHBerlinger

DATE 9/ 7/94 9/12/94 9/22/94 10/26/94*D:DE/NRR

C:RVIIB/NRR

D:DOTS/NRR

C:OECB/NRR

D:DOPS/NRR

BWSheron RGallo RLSpessard

AEChaffee

BKGrimes 11/01/94 12/ /94 12/ /94 12/ /94 12/OFFICIAL RECORD COPY

IN 94-xx October xx, 1994 In doing post maintenance

testing, the licensees

did not find evidence of impending

breaker failures because the tests were done mainly to determine whether the breaker tripped or closed.Related Generic Communications

Although involving

a different

type of circuit breaker, NRC IN 93-26, "Grease Solidification

Causes Molded-Ca'e

Circuit Breaker Failure to Close," issued April 7, 1993, and its supplement

ssued January 31, 1994, described

a similar problem with grease solidification.

This information

notice requires no spe fic action or written response.

If you have any questions

about the informat n in this notice, please contact one of the technical

contacts listed below the appropriate

Office of Nuclear Reactor Regulation (NRR) project mana r.Brian K. Grim , Director Division of Ope0ating

Reactor Support Office of Nuclea Reactor Regulation

Technical

contact(s):

Tirupataiah

Tella, Region III (708) 829-9749 Rogelio Mendez, Region III (708) 829-9745 Sikhindra

K. Mitra, NRR (301) 504-2703 Attachments:

1. List of Recently Issued NRC Information

Notices* see EGGreenman

memorandum

to RLDennig dated June 15, 1994 and Drevious concurrence

pages I OFFICE *Region III *Region III *Region III *Region III NAME TTella RMendez GEGrant EGGreenman

DATE 9/ 7/94 6/10/94 6/10/94 6/13/94 OFFICE *OGCB/NRR

• Tech Ed *EELB/NRR

• C:EELB/NRR

NAME RJKiessel

JMain JM SKMitra CHBerlinger

DATE 9/ 7/94 9/12/94 9/22/94 10/26/94*D:DE/NRR

C:RVIB/NRR

D:DOTS/NRR

C:OECB/NRR

D:DOPS/NRR

BWSheron RGalloj RLSpessard

AEChaffee

BKGrimes 11/01/94 11/ /94 11/ /94 11/ /94 11/ /94 DOCUMENT NAME: NRCIN.471 I.IN 94-xx October xx, 1994 In doing post maintenance

testing, the licensees

did not find evidence of impending

breaker failures because the tests were done mainly to determine whether the breaker trfpped or closed.Related Generic Communica'tions

Although involving

a different

type of circuit breaker, NRC IN 93-26, *Grease Solidification

Causes Molded-Ca

Circuit Breaker Failure to Close," issued April 7, 1993, and its supplement

issued January 31, 1994, described

a similar problem with grease solidification.

This information

notice requires no s cific action or written response.

If you have any questions

about the informa ion In this notice, please contact one of the technical

contacts listed belo or the appropriate

Office of Nuclear Reactor Regulation (NRR) project ma ager.Brian K. G mes, Director Division of erating Reactor Support Office of Nuc ar Reactor Regulation

Technical

contact(s):

Tirupataiah

Tella, Region III (708) 829-9749 Rogelio Mendez, Region III (708) 829-9745 Sikhindra

K. Mitra, NRR (301) 504-2703 Attachments:

1. List of Recently Issued NRC Information

Notices* see EGGreenman

memorandum

to RLDennig dated June 15, 1994 and previous concurrence

pages a_ _ _ _ _ _ _ L _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _OFFICE *Region III *Region III *Region III *Region III NAME TTella IRMendez GEGrant EGGreenman

DATE 9/ 7/94 6/10/94 6/10/94 6/13/94 OFFICE *OGCB/NRR

• Tech Ed *EELB/NRR

C gerL NAME RJKiessel

JMain JM SKMitra CH e nger DATE 9/ 7/94 l 9/12/94 9/22/94 10 /94 OFFICE p:E/NR C:OECB/NRR

l D:DOPS/NRR

NAME 7B iheron AEChaffee

BKGrimes DATE L/ I L/94 10/ /94 10/ /94 DOCUMENT NAME: NR5Ir\.471 IN 94-xx September

xx, 1994 In doing post ma tenance testing, the icensees did not find evidence of impending

breaker ilures because the were done mainly to determine

whether the breaker tripped closed. SW, This information

notice quires no specific action or written response.

If you have any questions

abo the information

in this notice, please contact one of the technical

contact listed below or the appropriate

Office of Nuclear Reactor Regulation (NR project manager.1an K. Grimes, Director tvision of Operating

Reactor Support tkce of Nuclear Reactor Regulation

Technical

contact(s):

Tirupataiah

Tella, Rgion III (708) 829-9749 \Rogelio Mendez, Region Ilk (708) 829-9745 \Sikhindra

K. Mitra, NRR (301) 504-2703 Attachments:

1. List of Recently Issued NRC Information

Notices* see EGGreenman

memorandum

to RLDennig and Drevious concurrence

nBaan dated June 15, 1994 OFFICE J

• II *Region III *Region III *Region III NAME TTella RMendez GEGrant EGGreenman

I DATE I 9/ 7/94 6/10/94 6/10/94 1 6/13/94 .= I I__OFFICE*OGCB/NRR*Tarh Fkl cro i nonnD r_ .err n. Al-n0 I I. L.LL.U/ I CLDt% l LLLVIflKKDit21kih

f i ________________

NAME RJKlessel JMalin OM qrIMi t"M ML&ruD^-1 ----_AME RI esse_ _n JM,- -- uVrMI ILnge DATE 9/ 7/94 9/12/94 9/2_t194 9/ /94 OFFICE D:DE/NRR C:OGCB/NRR

[ D:DORS/NRR

NAME BWSheron ELDoolittle

BKGrimes _DATE I 9/ /94 9/ /94 I_9_ _ 94_ _)FOCUMFNT

M AMFP N JDJrT A71 11.-. , w -8u .III%% AM .'T 1 1