ML20246E159: Difference between revisions

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CORE SPRAY INJECTION VALVE LOW PRESSURE PERMISSIVE LOGIC AND SET POINT (TAC N0. 64121)
CORE SPRAY INJECTION VALVE LOW PRESSURE PERMISSIVE LOGIC AND SET POINT (TAC N0. 64121)
RE:          SHOREHAM NUCLEAR POWER STATION The original Shoreham core spray system design opened the loop injection valve (M0V-033) following actuation of a LOCA signal based on a differential pressure detector signal (PDS-033) across the valve itself. This signal opens the valve at 450 psid and is arranged in a simple one out of one' logic. The core spray pump discharge pressure is about 290 psig, and, together with the 450 psid setting of PDS-033, would allow MOV-33 to open at a reactor pressure of about 740 psig. The piping upstream of the loop injection valve is designed for 500 psig only. If the loop injection check valve (1E26-F006 A or B) were to stick or leak, the core spray piping could be exposed to excessive pressures. On this basis, the staff has required that LILCO change the low pressure permissive interlock design to a design that would prevent overpressurization of the core spray piping, assuming a check valve failure.
RE:          SHOREHAM NUCLEAR POWER STATION The original Shoreham core spray system design opened the loop injection valve (M0V-033) following actuation of a LOCA signal based on a differential pressure detector signal (PDS-033) across the valve itself. This signal opens the valve at 450 psid and is arranged in a simple one out of one' logic. The core spray pump discharge pressure is about 290 psig, and, together with the 450 psid setting of PDS-033, would allow MOV-33 to open at a reactor pressure of about 740 psig. The piping upstream of the loop injection valve is designed for 500 psig only. If the loop injection check valve (1E26-F006 A or B) were to stick or leak, the core spray piping could be exposed to excessive pressures. On this basis, the staff has required that LILCO change the low pressure permissive interlock design to a design that would prevent overpressurization of the core spray piping, assuming a check valve failure.
In a letter dated February 18, 1983, LILCO committed to make these design changes before startup after the first refueling outage and to provide NRC the conceptual design for staff review before the modifications are implemented.
In a {{letter dated|date=February 18, 1983|text=letter dated February 18, 1983}}, LILCO committed to make these design changes before startup after the first refueling outage and to provide NRC the conceptual design for staff review before the modifications are implemented.
In a letter dated June 29, 1983, LILCO submitted the conceptual design modification to the core spray injection valve low pressure permissive logic.
In a {{letter dated|date=June 29, 1983|text=letter dated June 29, 1983}}, LILCO submitted the conceptual design modification to the core spray injection valve low pressure permissive logic.
The new logic uses absolute pressure rather than the differential pressure                        i across the injection valve. The proposed low pressure permissive setpoint is                      '
The new logic uses absolute pressure rather than the differential pressure                        i across the injection valve. The proposed low pressure permissive setpoint is                      '
465 psig which is less than the 500 psig design pressure.
465 psig which is less than the 500 psig design pressure.
i In a letter dated January 27, 1989, LILC0 informed the staff that GE has reviewed the new design and concluded that the change would have a negligible (less than 1*F) impact on the peak cladding temperature in the ECCS analysis.                      .
i In a {{letter dated|date=January 27, 1989|text=letter dated January 27, 1989}}, LILC0 informed the staff that GE has reviewed the new design and concluded that the change would have a negligible (less than 1*F) impact on the peak cladding temperature in the ECCS analysis.                      .
Since the proposed modifications impact on the analyses is minor, and will prevent overpressurization of the core spray piping, the staff concludes that 8905110168 890504 2 DR ADOCK 0500 1 (
Since the proposed modifications impact on the analyses is minor, and will prevent overpressurization of the core spray piping, the staff concludes that 8905110168 890504 2 DR ADOCK 0500 1 (


Revision as of 01:24, 9 March 2021

Requests That Util Proceed to Implement Conceptual Design for Core Spray Injection Valve Low Pressure Permissive Logic & Setpoint Before Startup After First Refueling Outage,Per 830218 Commitment
ML20246E159
Person / Time
Site: Shoreham File:Long Island Lighting Company icon.png
Issue date: 05/04/1989
From: Brown S
Office of Nuclear Reactor Regulation
To: Leonard J
LONG ISLAND LIGHTING CO.
References
TAC-64121, NUDOCS 8905110168
Download: ML20246E159 (5)
v • d • e


Text

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May 4, 1989 i

Docket No. 50-322 Mr. John D. Leonard, Jr.

Vice President-Nuclear Operations Long Island Lighting Company Shoreham Nuclear Power Station P.O. Box 618, North Country Road Wading River, NY 11792 l

Dear Mr. Leonard:

SUBJECT:

CORE SPRAY INJECTION VALVE LOW PRESSURE PERMISSIVE LOGIC AND SET POINT (TAC N0. 64121)

RE: SHOREHAM NUCLEAR POWER STATION The original Shoreham core spray system design opened the loop injection valve (M0V-033) following actuation of a LOCA signal based on a differential pressure detector signal (PDS-033) across the valve itself. This signal opens the valve at 450 psid and is arranged in a simple one out of one' logic. The core spray pump discharge pressure is about 290 psig, and, together with the 450 psid setting of PDS-033, would allow MOV-33 to open at a reactor pressure of about 740 psig. The piping upstream of the loop injection valve is designed for 500 psig only. If the loop injection check valve (1E26-F006 A or B) were to stick or leak, the core spray piping could be exposed to excessive pressures. On this basis, the staff has required that LILCO change the low pressure permissive interlock design to a design that would prevent overpressurization of the core spray piping, assuming a check valve failure.

In a letter dated February 18, 1983, LILCO committed to make these design changes before startup after the first refueling outage and to provide NRC the conceptual design for staff review before the modifications are implemented.

In a letter dated June 29, 1983, LILCO submitted the conceptual design modification to the core spray injection valve low pressure permissive logic.

The new logic uses absolute pressure rather than the differential pressure i across the injection valve. The proposed low pressure permissive setpoint is '

465 psig which is less than the 500 psig design pressure.

i In a letter dated January 27, 1989, LILC0 informed the staff that GE has reviewed the new design and concluded that the change would have a negligible (less than 1*F) impact on the peak cladding temperature in the ECCS analysis. .

Since the proposed modifications impact on the analyses is minor, and will prevent overpressurization of the core spray piping, the staff concludes that 8905110168 890504 2 DR ADOCK 0500 1 (

i.

conceptual design is acceptable. LILCO should proceed to implement this i design before startup after the first refueling outage per its February 18, 1 1983 comitment.

\.

Stewart W. Brown, Project Manager Project Directorate I-2 Division of Reactor Projects I/II Office of Nuclear Reactor Regulation cc: See next page l

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a conceptual design is acceptable. LILC0 should proceed to implement this

-design before startup after the first refueling outage per its February 18, 1983 commitinent.

/s/

Stewart W. Brown, Project Manager

-Project Directorate I-2 Division of Reactor Projects I/II Office of Nuclear Reactor Regulation cc: See next page DISTRIBUTION dDocketF11ed*

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l . Mr. John D. Leonard, Jr. Shoreham Nuclear Power Station Long Island Lighting Company l:

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Victor A. Staffieri, Esq. Supervisor General Counsel Town of Brookhaven L Long Island Lighting Company 205 S. Ocean Ave.

175 East Old County Road Patchogue, New York 11772 Hicksville, New York 11801 Town Attorney W. Taylor Reveley III, Esq. Town of Brookhaven Hunton & Williams 3232, Route 112 Post Office Box 1535 Medford, NY 11763 i 707 East Main Street Richmond, Virginia 23212 MNR Technical Associates 1723 Hamilton Avenue Mr. Lawrence Britt Suite K Shoreham Nuclear Power Station San Jose, California 95125 Post Office Box 618 Wading River,.New York 11792 Richard M. Kessel ,

Chairw.n & Executive Director.

Mr. John Scalice New York State Consumer Protection Plant Manager Boar 6 Shoreham Nuclear Power Station Room 1725 Post Office Box 628 250 Broadway -'

Wading River, New York 11792 New York, NY 10007 Resident Inspector Jonathan D. Feinberg, Esq.

Shoreham NPS New York State Department U.S. Nuclear Regulatory Commission of Public Service Post Office Box B Three Empire State Plaza i

Rocky Point, New York 11778 Albany, New York 12223 Regional Administrator, Region I Gerald C. Crotty, Esq.  !

U.S. Nuclear Regulatory Commission Ben Wiles Esq.

475 Allendale Road Counsel to the Governor King of Prussia, Pennsylvania 19406 Executive Chamber State Capitol Ms. Donna Ross Albany, New York 12224 New York State Energy Office Agency Building 2 Herbert H. Brown, Esq.

Empire State Plaza Lawrence Coe Lanpher Esq.

Albany, New York 12223 Karla J. Letsche, Esq.

Kirkpatrick & Lockhart South Lobby - 9th Floor i 1800 M Street, N.W. i Washington, D.C. 20036-5891 i

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,' , L'ong Island Lighting Company Shoreham cc:

Dr. Monroe Schneider Mr. Charlie Donaldson-North Shore Committee Assistant Attorney General Post Office Box 231 NYS Department of Law Wading River, NY 11792 Room 3-118 120 Broadway Fabian G. Palomino, Esq. New York, NY 10271 Special Counsel to the Governor Executive Chamber - State Capitc1 Albany, NY 12224 Martin Bradley Ashare, Esq.

Suffolk County Attorncy

.H. Lee Dennison Building Veteran's Memorial Highway

  • Hauppauge, NY 11788 i Robert Abrams, Esq.

Attorney General of the Stete of New York ATTN: John Corwin, Esq.

New York State Department of Law --

Consumer Protection Bureau 120 Broadway 3rd Floor New York, NY 10271 Honorable Peter Cohalan Suffolk County Executive County Executive / Legislative Building Veteran's Memorial Highway Hauppauge, NY 11788 Ms. Nora Bredes Shoreham Opponents Coalition 195 East Main Street Smithtown, New York 11787 Chris Nolin New York State Assembly Energy Committee 626 Legislative Office Building Albany, New York 12248

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