ML16341F703

Informs That Util Response to NRC Bulletin 89-003, Potential Loss of Required Shutdown Margin During Refueling Operations, Satisfactory

ML16341F703
Person / Time
Site:	Diablo Canyon
Issue date:	05/17/1990
From:	Rood H Office of Nuclear Reactor Regulation
To:	Shiffer J PACIFIC GAS & ELECTRIC CO.
References
IEB-89-003, IEB-89-3, TAC-75421, TAC-75422, NUDOCS 9005230231
Download: ML16341F703 (6)

Text

May 17, 1990 Docket Nos.

50-275 and 50-323 Mr. J.

D. Shiffer, Vice President Nuclear Power Generation c/o Nuclear Power Generation, Licensing Pacific Gas and Electric Company 77 Beale Street, Room 1451 San Francisco, California 94106 D ISTRIBUTIONM R ii'i(4(

NRC 5 LPDR~ DLaBarge PD5 Reading ACRS (10)

JZwolinski EJordan JLarkins HRood PShea OGC

SUBJECT:

CLOSEOUT OF NRC BULLETIN 89-03 FOR DIABLO CANYON POWER PLANT, UNITS 1

AND 2 (TAC NOS.

75421 AND 75422)

"On November 21, 1989, the NRC staff issued Bulletin 89-03, "Potential Loss of Required Shutdown Margin During Refueling Operations."

The bulletin requested

,that all PWR licensees take the actions described in the bulletin to ensure

'hat an adequate shutdown margin is maintained during all refueling operations.

To accomplish this, three actions were described:

1.

Assure that any intermediate fuel assembly configuration (including control rods) intended to be used during refueling is identified and evaluated to maintain sufficient refueling boron concentration to result in a minimum shutdown margin of approximately 5 percent.

2.

Assure that fuel loading procedures only allow those intermediate fuel assembly configurations that do not violate the allowable shutdown margin and that these procedures are strictly adhered to.

3.

Assure that the staff responsible for refueling operations is trained in the procedures recommended in Item 2, ab'ove, and understand the potential consequences of violating these procedures.

This training should include the fundamental aspects of criticality control with enriched fuel assemblies.

By letter dated January 26, 1990, Pacific Gas and Electric Company responded to NRC Bulletin 89-03.

In your response, you confirmed that programs are in place to address all three actions described above.

Therefore, the NRC staff considers your response to Bulletin 89-03 to be satisfactory.

This completes our action on this issue and closes TAC Nos.

75421 and 75422.

90052302"S 9005>7 PDR ADOCK 05000275 9

PDC Sincerely, Original Signed by Harry Rood Harry Rood, Senior Project Manager Project Directorate V

Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation cc:

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k~*g4 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 May 17, 1990 Docket Nos.

50-275 and 50-323 Mr. J.

D. Shiffer, Vice President Nuclear Power Generation c/o Nuclear Power Generation, Licensing Pacific Gas and Electric Company 77 Beale Street, Room 1451 San Francisco, California 94106

SUBJECT:

CLOSEOUT OF NRC BULLETIN 89-03 FOR DIABLO CANYON POWER PLANT, UNITS I AND 2 (TAC NOS.

75421 AND 75422)

On November 21,

1989, the NRC staff issued Bulletin 89-03,,"Potential Loss of Required Shutdown Margin During Refueling Operations."

The bulletin requested that all PWR licensees take the actions described in the bulletin to ensure that an adequate shutdown margin is maintained during a'll refueling operations.

To accomplish this, three actions were described:

1.

Assure that any intermediate fuel assembly configuration (including control rods) intended to be used during refueling'is identified and evaluated to maintain sufficient refueling boron concentration to result in a minimum shutdown margin of approximately 5 percent.

2.

Assure that fuel loading procedures only allow those intermediate fuel assembly configurations that do not violate the allowable shutdown margin and that these procedures are strictly adhered to.

3.

Assure that the staff responsible for refueling operations is trained in the procedures recommended in Item 2, above, and understand the potential consequences of violating these procedures.

This training should include the fundamental aspects of criticality control with enriched fuel assemblies.

By 'letter dated January 26, 1990, Pacific Gas and Electric Company responded to NRC Bulletin 89-03.

In your response, you confirmed that programs are in place to address all three actions described above.

Therefore, the NRC staff considers your response to Bulletin 89-03 to be satisfactory.

This completes our action on this issue and closes TAC Nos.

75421 and 75422.

S incere ly, cc:

See next page Harry Rood, Senior Project Manager Project Directorate V

Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation

A UW

Mr. J.

D. Shiffer Pacific Gas and Electric Company Diablo Canyon CC:

Richard F. Locke, Esq.

Pacific Gas 8 Electric Company Post Office Box 7442 San Francisco, California 94120 Ms. Sandra A. Silver 660 Granite Creek Road Santa Cruz, California 95065 Mr. Peter H. Kaufman Deputy Attorney General State of California 110 West A Street, Suite 700 San Diego, California 92101 Managing Editor The Count Tele ram Tribune o nson venue P. 0.

Box 112 San Luis Obispo, California 93406 Ms. Nancy Culver 192 Luneta Street San Luis Obispo, California 93401 Regional Administrator, Region V

U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 Mr. John Hickman Senior Realth Physicist Environmental Radioactive Mgmt. Unit Environmental Management Branch State Department of Health Services 714 P Street, Room 616 Sacramento, California 95814 NRC Resident Inspector Diablo Canyon Nuclear Power Plant c/o U.S. Nuclear Regulatory Commission P. 0. Box 369 Avila Beach, California 93424 Bruce Norton, Esq.

c/o Richard F. Locke, Esq.

Pacific Gas and Electric Company Post Office Box 7442 San Franci sco, California 94120 Dr. R. B. Ferguson Sierra Club - Santa Lucia Chapter Rocky Canyon Star Route Creston, California 93432 Chairman San Luis Obispo County Board of Supervisors Room 270 County Government Center San Luis Obispo, California 93408 Michael M. Strumwasser, Esq.

Special Assistant Attorney General State of California Department of Justice 3580 Wi lshire Boulevard, Room 800 Los Angeles, California 90010

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