ML17291A198

Forwards Safety Evaluation Accepting Util Cycle 10 Reload Design W/Reused Channel Boxes & Methods Used to Account for Channel Box Impact on Core Operating Limits,In Response to NRC Bulletin 90-02

ML17291A198
Person / Time
Site:	Columbia
Issue date:	07/12/1994
From:	Clifford J Office of Nuclear Reactor Regulation
To:	Parrish J WASHINGTON PUBLIC POWER SUPPLY SYSTEM
Shared Package
ML17291A199	List: ML17291A198 ML17291A200
References
IEB-90-002, IEB-90-2, TAC-M89124, NUDOCS 9407150120
Download: ML17291A198 (6)

Text

July 12, 1994 Docket No. 50-397 Hr. J.

V. Parrish (Mail Drop 1023)

Assistant Managing Director, Operations Washington Public Power Supply System P. 0.

Box 968.

Richland, Washington 99352-0968

SUBJECT:

WASHINGTON PUBLIC POWER SUPPLY SYSTEM NUCLEAR PROJECT NO.

2

RESPONSE

TO NRC BULLETIN NO. 90-02 (TAC NO. H89124)

NRC Bulletin No. 90-02, "Loss of Thermal Margin Caused by Channel Box Bow,"

requested licensees to verify that they are meeting current minimum critical power ratio technical specifications when reusing channel boxes.

The bulletin also asked licensees to send us reused channel box information.

Your March 29, May 20, and'une 20, 1994, letters responded to the bulletin and our followup questions.

We reviewed your responses and find that they resolve the NRC Bulletin 90-02 issues for Cycle 10.

However, we require you to obtain prior NRC approval if you want to reuse channel boxes in future cycles.

Enclosed is a copy of the NRC safety evaluation.

-Si'ncerely, James W. Clifford, Senior Project Manager Project Directorate IV-2 Division of Reactor Projects - III/IV Office of Nuclear Reactor Regulation

Enclosure:

Safety Evaluation cc w/enclosure:

See next page DISTRIBUTION Docket File v EAdensam JRoe TQuay ACRS (10),

P-315 AAttard NRC

& Local PDRs DFoster-Curseen PDIV-2 Reading File

KPerkins, WCFO MPadovan OFC NAME LA/PDIV-2

~

PH PDIV-2 DFoster-C seen JCliffor D PDIV-2 TQuay DATE 7 / /94 gee.

gg 7

94 OFFICIAL RECORD COPY DOCUMENT NAME:

WNP89124.LTR 9407250220 940722 PDR ADOCK 05000397 Q

PDR

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Docket No. 50-397 Hr. J.

V. Parrish (Hail Drop 1023)

Assistant Managing Director, Operations Washington Public Power Supply System P. 0.

Box 968

Richland, Washington 99352-0968

SUBJECT:

WASHINGTON PUBLIC POWER SUPPLY SYSTEM NUCLEAR PROJECT NO.

2

RESPONSE

TO NRC BULLETIN NO. 90-02 (TAC NO. H89124)

NRC Bulletin No. 90-02, "Loss of Thermal Margin Caused by Channel Box Bow,"

requested licensees to verify that they are meeting current minimum critical power ratio technical specifications when reusing channel boxes.

The bulletin also asked licensees to send us reused channel box information.

Your March 29, Hay, 20, and June 20, 1994, letters responded to the bulletin and our followup questions.

We reviewed your responses and find that they resolve the NRC Bulletin 90-02 issues for Cycle 10.

However, we require you to obtain prior NRC approval if you want to reuse channel boxes in future cycles.

Enclosed is a copy of the NRC safety evaluation.

Sincerely, James W. Clifford, Senior Project Manager Project Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation

Enclosure:

Safety Evaluation cc w/enclosure:

See next page DISTRIBUTION Docket File EAdensam JRoe Tguay ACRS (10),

P-315 AAttard NRC 5 Local PDRs DFoster-Curseen PDIV-2 Reading File

KPerkins, WCFO HPadovan OFC NAME DATE LA/PDIV-2 DFoster-C seen 7//

94 PM/PDIV-2 JCliffor 7 >-94 P

D PDIV-2 Tguay 7

94 OFFICIAL RECORD COPY DOCUMENT NAME:

WNP89124.LTR

gag RE0y 0

Cy I

0 C

O I

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++*++

Docket No. 50-397 UNITED STATES NUCLEAR REGULATORY COMM(SS[ON WASHINGTON, D.C. 20555-000I July 12, 1994 Hr. J.

V. Parrish (Hail Drop 1023)

Assistant, Hanaging Director, Operations Washington Publ.ic Power Supply System P. 0.

Box 968

Richland, Washington 99352-0968

SUBJECT:

WASHINGTON PUBLIC POWER SUPPLY SYSTEH NUCLEAR PROJECT NO.

2

RESPONSE

TO NRC BULLETIN NO. 90-02 (TAC NO. H89124)

NRC Bulletin No. 90-02, "Loss of Thermal Hargin Caused by Channel Box Bow,"

requested licensees to verify that they are meeting current minimum critical power ratio technical specifications when reusing channel boxes.

The bulletin also asked licensees to send us reused channel box information.

Your Harch 29, Hay 20, and June 20, 1994, letters responded to the bulletin and our followup questions.

We reviewed your responses and find that they resolve the NRC Bulletin 90-02 issues for Cycle 10.

However, we require you to obtain prior NRC approval if you want to reuse channel boxes in future cycles.

Enclosed is a copy of the NRC safety evaluation.

Sincerely,

Enclosure:

Safety Evaluation cc w/enclosure:

See next page James W. Clifford, Senior Project Manager Project Directorate IV-2 Division of Reactor Projects - III/IV Office of Nuclear Reactor Regulation

Hr. J.

V. Parrish Washington Public Power Supply System WPPSS Nuclear Project No.

2 (WNP-2)

CC:

Hr. J.

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

Box 968

Richland, Washington 99352-0968 G.

E.

C. Doupe, Esq.

(Mail Drop 396)

Washington Public Power Supply System 3000 George Washington Way

Richland, Washington 99352-0968 Mr. Warren Bishop, Chairman Energy facility Site Evaluation Council P. 0.

Box 43172 Olympi a, Washington 98504-3172 Hr. H. K. Kook (Hail Drop PE20)

WNP-2 Licensing Manager Washington Public Power Supply System P. 0.

Box 968

Richland, Washington 99352-0968 Mr. Paul R.

Bemis (Hail Drop PE20)

Regulatory Programs Manager Washington Public Power Supply System P. 0.

Box 968

Richland, Washington 99352-0968 Regional Administrator, Region IV U. S. Nuclear Regulatory Commission Harris Tower

& Pavilion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Chairman Benton County Board of Commissioners P. 0.

Box 69

Prosser, Washington 99350-0190 Hr.

R.

C. Barr U. S. Nuclear Regulatory Commission P. 0.

Box 69

Richland, Washington 99352-0968 H.

H. Phil ips, Jr.,

Esq.

Winston

& Strawn 1400 L Street, NW.

Washington, DC 20005-3502

P

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