ML17303A254

Confirms That Listed Mods to Charging Sys,Remote Shutdown Panel & Valves CHE-PDY-239B & CHE-PDY-240B Control Circuitry Completed,Per Commitments

ML17303A254
Person / Time
Site:	Palo Verde
Issue date:	01/23/1987
From:	Haynes J ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Knighton G Office of Nuclear Reactor Regulation
References
ANPP-39829-JGH, TAC-56648, NUDOCS 8702020590
Download: ML17303A254 (6)

Text

4s REQULATOR NFORNATION

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r ACCESSION NBR: 8702020590, DOC. DATE: 87/01/23 NOTARIZED:

NO DOCKET 0 FACIL:STN-50-530 Palo Verde Nuclear Station>

Unit 3. Arizona Publi 05000530 AUTH. NANE AUTHOR AFFILIATION HAYNES> S. Q.

Arizona Nuclear Pouer Prospect (formerly Arizona Publ'ic Serv RECIP. NANE RECIPIENT AFFILIATION KNIQHTONiQ. W.

PWR Prospect Directorate 7

SUBJECT:

Confirms that listed mods

+o charging sgsiremote shutdown panel 5 Valves CHE-PDY-2398 8c CHE-PDY-2408 control circuitrg completed> per commitments.

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PHOENIX, ARIZONA85072-2034 January 23, 1987 ANPP-39829-JGH/BJA/98.05 Director of Nuclear Reactor Regulation Attention:

Mr. George W. Knighton, Project Director PWR Project Directorate P7 Division of Pressurized Water Reactor Licensing B

U.ST Nuclear Regulatory Commission Washington, D.C. 20555

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Unit 3 Docket No.

STN 50-530 Confirmation of Completion of Unit 3 Modifications File: 87-G-056-026

References:

(1)

(2)

(3)

(4)

(5)

Letter from E.

E.

Van Brunt, Jr.,

ANPP, to G.

W.

Knighton, NRC, dated October 15, 1985 (ANPP-33713).

Subject:

Auxiliary Pressurizer Spray Design.

Letter from E.

E.

Van Brunt, Jr.,

ANPP, to G.

W.

Knighton, NRC, dated November 4,

1985 (ANPP-33905).

Subject:

Information Concerning the PVNGS Auxiliary Pressurizer Spray System.

Letter from E.

E.

Van Brunt, Jr.,

ANPP, to G.

W.

Knighton, NRC, dated December 5,

1985 (ANPP-34174).

Subject:

Charging Pump Operability.

Letter from E.

E.

Van Brunt, Jr.,

ANPP, to G.

W.

Knighton, NRC, dated May 17, 1983 (ANPP-23782).

Subject:

PVNGS Remote Shutdown Panel.

Letter from E.

E.

Van Brunt, Jr.,

ANPP, to G.

W.

Knighton, NRC, dated December 18, 1984 (ANPP-31501).

Subject:

Auxiliary Pressurizer Spray Modification.

Dear Mr. Knighton:

The purpose of this letter is to provide confirmation that the following modifica-tions have been completed in PVNGS Unit 3 in accordance with the previous commit-ments.

The specific modifications are listed below along with a reference to the previous correspondence which initiated the commitment.

2.

The Unit 3 charging system was modified to provide power to valves CH-501 and CH-536 from a

Class 1E motor control center that does not get stripped from the bus following a safety injection actua-tion signal.

(Reference (1)).

The Unit 3 charging system was modified to provide for the auto-matic re-alignment of valves CH-501 and CH-536 on a low-low Volume Control Tank (VCT) leve3, and loss of offsite power (Reference (1)).

Qyo l I/Q

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Mr. George W. Knighton

Subject:

Confirmation of Completion of Unit 3 Modifications ANPP-39829 Page 2

3.

The Unit 3 charging system was modified to enhance the VCT level instrumentation (Reference (1)).

4, A procedure change has been completed to lock open charging system valves CH-532 and CH-524 (Reference (2)).

5.

6.

The Unit 3 charging system has been modified to install vent piping to ensure that hydrogen gas will not be vented into an area that does not receive essential ventilation.

(Reference (3)).

Reactor coolant system cold leg temperature indication has been provided on the Unit 3 remote shutdown panel.

(Reference (4)).

7.

Class lE overvoltage protection isolation relays have been installed in the control circuitry for valves CHE-PDY-239B and CHE-PDY-240B.

(Reference (5)).

If you have any additional questions on this matter, please contact Mr.

M. F.

Quinn of my staff.

Very truly yours, J.

G.

Haynes Vice President Nuclear Production JGH/BJA/rw cc:

0.

M. De Michele E. E.

Van Brunt, Jr.

E. A. Licitra R.

P.

Zimmerman A. C. Gehr

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