ML17056B714

Discusses Consideration of Results of NRC Sponsored Test of Motor Operated Valves.Lists Areas Which Should Be Addressed in Program Responsive to Generic Ltr 89-10, Consideration of Results of NRC Sponsored Test of Movs

ML17056B714
Person / Time
Site:	Nine Mile Point
Issue date:	03/12/1992
From:	Capra R Office of Nuclear Reactor Regulation
To:	Sylvia B NIAGARA MOHAWK POWER CORP.
References
GL-89-10, TAC-M77787, TAC-M77788, NUDOCS 9203190313
Download: ML17056B714 (12)

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Docket Nos.

50-220 and 50-410 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, O. C. 20555 March 12, 1992 Hr.

B. Ralph, Sylvia Executive Vice President, Nuclear Niagara Mohawk Power Corporation 301 Plainfield Road

Syracuse, New York 13211

SUBJECT:

CONSIDERATION OF THE RESULTS OF NRC SPONSORED TEST OF MOTOR OPERATED VALVES AT NINE NILE POINT NUCLEAR STATION UNITS 1

AND 2 (TAC NOS.

H77787 AND H77788)

By letters dated December 14,

1990, and March 12, 1991, for Nine Mile Point Unit No.

1, and March 7, 1991, for Nine Mile Point Unit 2, Niagara Mohawk Power Corporation (NMPC) submitted a response to Supplement 3 to Generic Letter (GL) 89-10, "Consideration of the Results of NRC Sponsored Test of Motor Operated Valves."

In a submittal dated July 29,

1991, NHPC answered NRC staff questions on the response to Supplement 3 to GL 89-10.

Based on the information provided by NMPC, the NRC staff has not identified any immediate concerns regarding the capability of the motor operated valves (HOV) within the scope of Supplement 3 to perform their design basis function to isolate the containment in the event of a pipe break downstream of the valves.

However, NHPC should demonstrate, in accordance with the schedule of Supplement 3 to GL 89-10, that the Unit 2 Feedwater HOVs 21A and B will not be required to operate against more than 100 pounds per square inch (psi) differential pressure.

NHPC is requested to notify the NRC staff, in writing, of the results of this effort within 90 days of receipt of this letter.

With the exception of the differential pressure verification for HOVs 21A and B,

the NRC staff considers it appropriate to address the HOVs applicable to Supplement 3 as part of its GL 89-10 program and schedule, unless further information dictates accelerated action.

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> ';"0C "~'3 ZZIr'"7 As a result of the NRC staff review of licensee responses to GL 89-10 and its supplements and inspection experience, the staff has identified a number of areas which should be addressed in the GL 89-10 program.

These areas are:

(1) the structural limits of each MOV in light of the increased thrust and torque requirements based on industry experience and research testing; (2) the reduction in thrust delivered by the actuator that may occur as a result of the "rate of loading" phenomenon; (3) the reduction of motor output that may occur as a result of high ambient temperature; (4) the capability of the valves to satisfy any leakage limits associated with the NHPC's safety analyses when closing under design basis conditions (particularly where the

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Hr. B. Ralph Sylvia Ifarch 12, 1992 torque switch is set assuming low valve factors, but is bypassed for a significant portion of the valve stroke);

(5) its justification for the assumed stem friction coefficient; (6) its justification for the assumed differential pressure under which the HOVs may be called upon to operate in light of the intent of GL 89-10; (7) the inaccuracy of HOV diagnostic equipment in measuring delivered torque or thrust; (8) the assumed minimum voltage available to the motor as compared to its licensing commitments; and (9) the closing stroke time under design basis conditions in relation to technical specifications or safety analyses, (particularly for dc motors).

In addition to your own MOV tests, the NMPC is expected to monitor the MOV tests performed by other organizations for information on the torque and thrust required to operate its valves under design basis conditions.

NHPC is expected to take action to ensure MOV operability where those tests raise questions regarding the required torque or thrust estimates.

With respect to the review of the NRC-sponsored HOV tests by the Electric Power Research Institute (EPRI), the NRC staff agrees with the evaluation by the Idaho National Engineering Laboratory

( INEL) provided in EGG-SSRE-9926 (November 12, 1991),

"Evaluation of EPRI Draft Report NP-9926 - Review of NRC/INEL Gate Valve Test Program."

During inspections of the GL 89-10 program, the NRC staff will confirm the NHPC's assumptions and calculations for MOVs within the scope of Supplement 3

as well as the other HOVs within the scope of GL 89-10.

This requirement affects one respondent and, therefore, is not subject to Office of Management and Budget review under P.L.96-511.

We consider NHPC's response to GL 89-10, Supplement 3, complete and TAC Nos.

H77787 and 77788 are closed.

If you have any questions regarding this action, please contact Donald S.

Brinkman (Project Manager) at (301) 504-1409.

Sincerely cc:

See next page Robert A. Capra, Director Project Directorate I-1 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation

lf

Hr.

B. Ralph Sylvia Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station Unit Nos.

1 and 2

CC:

Hark J. Wetterhahn, Esquire Winston

5. Strawn 1400 L Street, NW Washington, DC 20005-3502 Supervisor Town of Scriba Route 8, Box 382

Oswego, New York 13126 Hr. Joseph F. Firlit Vice President - Nuclear Generation Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station Post Office Box 32

Lycoming, New York 13093 Resident Inspector U.

S. Nuclear Regulatory Commission Post Office Box 126

Lycoming, New York 13093 Gary D. Wilston, Esquire Niagara Mohawk Power Corporation 300 Erie Boulevard West

Syracuse, New York 13202 Regional Administrator, Region I

U. S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, Pennsylvania 19406 Hs.

Donna Ross New York State Energy Office 2 Empire State Plaza 16th Floor

Albany, New York 12223 Hr. Kim Dahlberg Unit 1 Station Superintendent Nine Mile Point Nuclear Station Post Office Box 32

Lycoming, New York 13093 Mr. Hartin J.

HcCormick Jr.

Plant Manager, Unit 2

!Nine Nile Point Nuclear Station Post Office Box 32

Lycoming, New Yor k 13093 Charles Donaldson, Esquire Assistant Attorney General New York Department of Law 120 Broadway New York, New York 10271 Hr. Paul D.

Eddy State of New York Department of Public Service Power Division, System Operations 3 Empire State Plaza

Albany, New York 12223 Mr. David K. Greene Manager Licensing Niagara Mohawk Power Corporation 301 Plainfield Road

Syracuse, New York 13212 Hr. Richard Goldsmith Syracuse University College of Law E. I. White Hall Campus

Syracuse, New York 12223 Hr. Richard M. Kessel Chair and Executive Director State Consumer Protection Board 99 Washington Avenue

Albany, New York 12210

Hr.

B. Ralph Sylvia 2

Ihrch 12, 1992 torque switch is set assuming low v'alve*factors, but is bypassed for a

significant portion of the valve stroke);

(5) its justification for the assumed stem friction coefficient; (6) its justification for the assumed differential pressure under-which the HOVs may be called upon to operate in light of the intent.of GL,89-10; (7) the',inaccuracy of MOV diagnostic equipment in measuring delivered torque'or thrust; (8) the assumed minimum voltage available to the motor as compared to its licensing commitments; and (9) the closing stroke time under design basis conditions in relation to technical specifications or safety analyses, (particularly for dc motors).

In addition to your own HOV tests, the NHPC is expected to monitor the HOV tests performed by other organizations for information on the torque and thrust required to operate its"valves under design basis conditions.

NHPC is expected to take action to ensure HOV operability where those tests raise questions regarding the required torque or thrust estimates.

With respect to the review of the NRC-sponsored HOV tests by the Electric Power Research Institute (EPRI), the NRC staff agrees with the evaluation by the Idaho National Engineering Laboratory (INEL) provided in EGG-SSRE-9926 (November 12, 1991),

"Evaluation of EPRI Draft Report NP-9926 - Review of NRC/INEL Gate Valve Test Program."

During inspections of the GL 89-10 program, the NRC staff will confirm the NMPC's assumptions and calculations for HOVs within the scope of Supplement 3

as well as the other HOVs within the scope of GL 89-10.

This requirement affects one respondent and, therefore, is not subject to Office of Management and Budget review under P.L.96-511.

We consider NHPC's response to GL 89-10, Supplement 3, complete and TAC Nos.

H77787 and 77788 are closed.

If you have any questions regarding this action, please contact Donald S.

Brinkman (Project Manager) at (301) 504-1409.

Sincerely Original Signed By Robert A. Cap a, Director Project Directorate I-l Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc:

See next a

e OFFICE IIAHE OATE PDI-1: LA CVo an ~

9 II 92 PDI-I:PH RALakra: c*

II 92 PDI-1: PH DSBrinkma I( 92 NRR:EMEB JNorber

• 3 5 92 PDI-1:D RACa ra 8 i292

• See previous concurrence OFFICIAL RECORD COPY FILENAME: B: iH77787

Hr, B. Ralph Sylvia conditions (particularly where the torque switch is set assuming low valv

factors, but is bypassed for a significant portion of the valve stroke).

(5) its justification for the assumed stem friction coefficient; (6) i s justification for the assumed differential pressure under which the Vs may be called upon to operate in light of the intent of GL 89-10; (7) e inaccuracy of HOV diagnostic equipment in measuring delivered tor e or thrust; (8) the assumed minimum voltage available to the motor compared to its licensing commitments; and (9) the closing stroke time und design basis conditions in relation to technical specifications or safety

nalyses, (particularly for dc motors).

In addition to your own MOV

ests, the NMPC is expected to monitor the HOV tests performed by other orga zations for information on the torque and thrust required to operate its valves under design basis conditions.

NHPC is expected to take act' to ensure HOV operability where those tests raise questions regardi g the required torque or thrust estimates.

With respect to the review of th NRC-sponsored HOV tests by the Electric Power Research Institute (EPRI),

e NRC staff agrees with the evaluation by the Idaho National Engineering Lab atory (INEL) provided in EGG-SSRE-9926 (November 12, 1991),

"Evaluation f EPRI Draft Report NP-9926 Review of NRC/INEL Gate Valve Test Program."

During inspections of the GL 89-10 progra

, the NRC staff will confirm the NMPC's assumptions and calculations for Vs within the scope of Supplement 3

as well as the other HOVs within the s

pe of GL 89-10.

This requirement affects one respon nt and, therefore, is not subject to Office of Management and Budget r iew under P.L.96-511.

We consider NHPC's response to L 89-10, Supplement 3,, complete and TAC Nos.

H77787 and 77788 are clo ed.

If you have'ny questions regarding this

action, please contact Dona S.

Brinkman, (Project Manager for Unit 1) or Richard A. Laura, (Acting roject Manager for Unit 2) at (301) 503-1409 or (301) 504-1424, respecti ely.

Sincerely cc:

See ext a

e Robert A. Capra, Director Project Directorate I-l Division of Reactor Projects I/II Office of Nuclear Reactor Regulation PDI-1: LA NAME CVo PDI-I:PH RALaura: c~

PDI-1: PH DSBrin an

. p'og.

N J or er PDI-1: D RACa ra DATE I/92 P /92 92 4 92 92 OFFICIAL RECORD COPY FILENAME: B: iM77787

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