ML20135A838

Part 21 Rept Re Environ Qualification Failure of Reliance Class Rh Ac Motors During Qualification Testing.Item Not Reportable Per Part 21

ML20135A838
Person / Time
Site:	Nine Mile Point, River Bend, 05000000
Issue date:	09/05/1985
From:	Stramback G GENERAL ELECTRIC CO.
To:	Rossi C NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
References
REF-PT21-85, REF-PT21-85-387-000 GBS-065-85, GBS-65-85, MFN-110-85, PT21-85-387, PT21-85-387-000, NUDOCS 8509100288
Download: ML20135A838 (3)

Text

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GENERAL $ ELECTRIC NUCLEAR ENERGY BUslNEss OPERATIONS GENERAL ELECTRIC COMPANY e 175 CURTNER AVENUE

• SAN JOSE, CAUFORNIA 95125 MC 682, (408) 925-1913 MFN-110-85 GBS-065-85 September 5, 1985 U. S. Nuclear Regulatory Commission Office of Inspection Enforcement Washington, D.C. 20555 Attention: Mr. C. E. Rossi Gentlemen:

SUBJECT:

TELECON: GERMANE-TO-SAFETY-ENVIRONMENTAL QUALIFICATION FAILURE OF RELIANCE CLASS RH AC MOTORS Please find the attached memo of Telecon to you of August 30, 1985. The Telecon provided information on Reliance Class RH AC motors obtained during environmental qualification testing.

Very truly yours, N

G.B.Stfamback, Manager Safety Evaluation Programs GBS:csc/IO8305 Attachment cc: L. S. Gifford, GE - Bethesda J. Stuart, NRC - Bethesda una O_,

S

. _ 8 O

MEM0 0F TELECON

DATE

August 30, 1985

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TIME: 8:05 a.m.

b PERSON CALLING: G.B.Strambhc),H.C. Shirley PERSON CALLED: C. E. Rossi (NRC-I&E)

(Telephone Number 301-492-4193)

SUBJECT:

ENVIRONMENTAL QUALIFICATION FAILURE OF RELIANCE CLASS RH AC MOTORS

{ Ernie Rossi was called in order to inform the NRC of a condition determined to

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be not reportable, but considered to be germane to safety. This conclusion is based upon GE completing its evaluation as to reportability under 10CFR Part 21.

This information is being communicated to the NRC because GE is not aware of th' requirements of other applications of these valves in the industry.

GE identified the sequence of previous communications to the NRC and that I&E has been following this issue.

[ General Electric has experienced 3 test anomalies of the Reliance Class RH AC

= motors during the environmental qualification testing of the Limitorque fast acting SB-3-150 vaive motor operator, for the Gulf States Utilities (GSU) and Niagara Mohawk (Nine Mile Point 2) customers.

These test anomalies which have occurred with the SB-3-150 operator have raised

^ concern with the long term (100-day) availability of valve operator motors with magnesium rotors (such motors are made for use in valve operators where high horsepower and high torque are required). These NUREG-0588 tests have been

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performed at environmental conditions enveloping plant specific valve applica-tions which may be more severe than the design basis for other plant specific

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valve applications. l

- Upon the initial occurrence of a test anomaly GE performed a systems evaluation

- to determine the implications of these environmental qualification test anomalies on overall plart safety. GE has also been in contact with the NRC over the evaluation of t0e Limitorque test program and GSU has filed with the NRC a 10CFR 50.55(e) n3tification of the initial anomaly. It has been concluded based on a systens evaluatian approach that a substantial safety hazard does

not exist for BWP plants. However, in order to eliminate any concern for the continued long ter., cooling of the core, GE has identified some recommended actions. These actions have been transmitted to BWR Owners / Operator via Service Iniormation Letter No. 425. The system evaluation was conservative in that it assumed all estor Operated valves required for safe shutdown were of

_ the facily of valves having magnesium rotors. This evaluation determined that no safety hazard existed for the entire BWR product line, BWR 1 through 6.

E

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GBS:csc/IO8305*-2 9/5/85

i GENERAL ELECTRIC COMPANY NUCLEAR SYSTEMS TECHNOLOGY OPERATION SAFETY AND LICENSING OPERATION TELECOPIER TRANSMITTAL COVER SHEET DATE: f  ![{

TIME: /h.* 3O M787 PLEASE DELIVER THE FOLLOWING PAGES TO:

NAME: h&

COMPANY AND LOCATION: k((C M TELECOPY NUMBER: [f 30 /- Vf a - pj pp ,

VERIFICATION NUMBER:

NUMBER OF PAGES: Ar]M41 P @ ho v f THIS TELECOPY IS BEING SENT BY:

NAME/ EXT. . h gr,sb/ d ,,  %)f'-g g -/g/]

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