ML17278A355

Submits Conclusions Formulated by WPPSS & Concurred in by NRC Re ECCS Activation Instrumentation,Per

ML17278A355
Person / Time
Site:	Columbia
Issue date:	08/09/1985
From:	Butler W Office of Nuclear Reactor Regulation
To:	Gill R AFFILIATION NOT ASSIGNED
References
NUDOCS 8508210315
Download: ML17278A355 (6)

Text

Docket No. 50-397 ck Gil 1

'ast 3207 24th Street

Spokane, Washington 99203 9

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SUBJECT:

EMERGENCY CORE COOLING SYSTEN ACTIVATION INSTRUHENTATION

References:

1.

Letter:

Gill to Butler dated June 23, 1985 2.

Letter:

Butler to Gill dated July 7, 1985 As indicated in our letter to you have been reviewed in some detail Power Supply 'System and the staff System has formulated and the NRC (Reference 2), your comments (Reference 1) by the technical staff of the Washington Public of the Nuclear Regulatory Commission.

The Supply staff concurs in the following conclusions:

Although the state of a breaker does not provide conclusive proof of operation of a component as you correctly point out, when the breaker state is coupled with actual pump operating parameters available in the control room (pump discharge pressure and flow) the operating condition of the pump can be confirmed.

The statement that "the proposed system would most likely result in a control signal indicating running all of the time" is not accurate.

The High Pressure Core Spray (HPCS) pump breaker opens and closes on pump demand only and is, in effect, the pump motor starter.

Since there are no intervening disconnect switches or starters, when the pump is secured the breaker opens and the valve will receive a close signal.

Although other methods of obtaining a

pump running signal exist or could be provided as you indicated, the proposed solution has been determined to be completely adequate for this application.

Thank you again for your interest and comments.

Sincerely, CC:

Pat Powell, WNP-2 Distribution

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2 Division of Licensing LBk'2/D WButle 8/Q /85 PSB/DSI SRhaw &g.

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Docket Ho. 50-397 aUG 9

1985 Nr. Rick Gill East 3207 24th Street

Spokane, Washington 99203

Dear ter. Gill:

SUBJECT'HERGENCY CORE COOLING SYSTEM ACTIVATIOH IHSTRUtiENTATION

References:

1.

Letter:

Gill tu Butler dated June 23, 1985 2.

Letter:

Butler to Gill dated July 7, 1985 As indicated in our letter to you (Reference 2), your comments (Reference 1) have been reviewed in some detail by the technical staff of the Washington Public Power Supply SystemI and the staff of the Nuclear Regulatory Commission.

The Supply System has formulated and the NRC staff concurs in the following conclusions:

Although the state of a breaker does not provide conclusive proof of operation of a component as you correctly point out, when the breaker state is coupled with actual pump operating parameters available in the control room (pump discharge pressure and flow) the operating condition nf the pump can be confirmed.

The statement that "the proposed system would most likely result in a control signal indicating running all of the time" is not accurate.

The High Pressure Core Spray (HPCS) pump breaker opens and closes on pump demand only and is, in effect, the pump motor starter.

Since there are no intervening disconnect switches or starters, when the pump is secured the breaker opens and the valve will receive a close signal.

Although other methods of obtaining a

pump running signal exist or could be provided as you indicated, the proposed solution has been determined to be completely adequate for this application.

Thank you again for your interest and commIents.

Sincerely, Walter R. Butler, Chief Licensing Branch Ho.

2 Division of Licensing CC:

Pat Powell, WNP-2 Distribution RRC OR C

l POR PRC R

Rill C

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+~*pW UNITEDSTATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 AUG 9

1985 Docket No. 50-397 Hr. Rick Gill East 3207 24th Street.

Spokane, Washington 99203

SUBJECT:

EMERGENCY CORE COOLING SYSTEII ACTIVATION INSTRUMENTATION

References:

1.

Letter:

Gill to Butler dated June 23, 1985 2.

Letter:

Butler to Gill dated July 7, 1985 As indicated in our letter to you (Reference 2), your coIImIents (Reference 1) have been reviewed in some detail by the technical staff of the Washington Public Power Supply System and the staff of the Nuclear Regulatory Commission.

The Supply System has formulated and the NRC staff concurs in the following conclusions:

Although the state of a breaker does not provide conclusive proof of operation of a component as you correctly point out, when the breaker state is coupled with actual pump operating parameters available in the control room (pump discharge pressure and flow) the operating condition of the pump can be confirmed.

The statement that "the proposed system would most likely result in a control signal indicating running all of the time" is not accurate.

The High Pressure Core Spray (HPCS) pump breaker opens and closes on pump demand only and is, in effect, the pump motor starter.

Since there are no intervening disconnect switches or starters, when the pump is secured the breaker opens and the valve will receive a close signal.

Although other methods of obtaining a pump running signal exist or could be provided as you indicated, the proposed solution has been determined to be completely adequate for this application.

Thank you again for your interest and comments.

cc:

Pat Powell, WNP-2 Qa47P Walter R. Butler, Chief Licensing Branch No.

2 Division of Licensing

Mr. G.,-C. Sorensen, Manager Washington Public Power Supp'ly System WPPSS Nuclear Project No.

2

{WNP-2)

CC:

Nicholas Reynold, Esquire

Bishop, Cook, Liberman, Purcell 8 Reynolds 1200 Seventeenth

Street, N.

W.

. Washington, D.

C.

20036 Mr. G.

E. Doupe, Esquire Washington Public Power Supply System P. 0.

Box 968

, 3000 George Washington Way Richlano, Washington 99532 Mr. Curtis Eschels, Chairman Energy Facility Site Evaluation Council Nail Stop PY-il Olympia, Washington 98504 P. L. Powell, Licensing Manager Washington Public Power Supply System

~ P. 0.

Box 968, IID 956B Richland, Washington 99352 Mr.

W.

G.

Conn Burns and Roe, Incorporated c/o Washington Public Power Supply System P. 0.

Box 968, MD 994E Richland Washington 99352 R.

B. Glasscock, Director.

Licensing and Assurance Washington Public Power Supply System P. 0.

Box 968, MD 280 Richland, Washington 99352 Mr. C.

H. Powers WNP-2 Plant Manager Washington Public Power Supply System P. 0.

Box MD 927M Richland, Washington 99352 Regional Administrator, Region 7

U.S. Nuclear flegulatory Commission 1450 l'laria Lane, Suite 210 Walrut Creek, California

.94596

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