ML16341F201

Advises That Licensee 890221 & 0606 Responses to Generic Ltr 88-14, Instrument Air Supply Sys Problems Affecting Safety-Related Equipment, Fulfills Requirement in Responding to Ltr & Completes Activities

ML16341F201
Person / Time
Site:	Diablo Canyon
Issue date:	06/12/1989
From:	Rood H Office of Nuclear Reactor Regulation
To:	Shiffer J PACIFIC GAS & ELECTRIC CO.
References
GL-88-14, TAC-71651, TAC-71652, NUDOCS 8906190252
Download: ML16341F201 (8)

Text

June 12, 1989 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, Califor nia 94106

Dear Mr. Shiffer:

DISTRIBUTION Ed d

NRC

& LPDR BGrimes GHolahan GEdison MVirgilio WLefave JLee ACRS (10)

HRood GKnighton PDV Plant File JCraig PNarbut (RV)

MMendonca (RV)

OGC (for info only)

SUBJECT:

CLOSEOUT OF NRC REVIEW OF GENERIC LETTER 88-14, "INSTRUMENT AIR SUPPLY SYSTEM.PROBLEMS AFFECTING SAFETY-RELATED EQUIPMENT," FOR DIABLO CANYON UNITS 1

AND 2 (TAC NOS.

71651 AND 71652)

Generic Letter 88-14 was issued on August 8, 1988 to all holders of operating licenses for nuclear power reactors.

The letter requested that each licensee review NUREG-1275, Volume 2, "Operating Experience Feedback Report - Air Systems Problems,"

and perform a design and operations verification of the instrument air system.

The ge'neric letter stated that this verification should include the following items:

(1)

Verify by test that actual instrument air quality is consistent with the manufacturer's recommendations for individual components served.

(2)

Verify that maintenance practices, emergency procedures, and training are adequate to ensure that safety-related equipment will function as intended on loss of instrument air!

(3)

Verify by test and analysis that the design of the entire instrument air system is in accordance with its,intended function, and (4)

Provide a discussion of the program for maintaining proper instrument air quality.

By letters dated February 21 and June 6, 1989, PG&E responded to Generic Letter 88-14.

The PG&E responses stated that "The evaluation that has been performed for the Diablo Canyon Power Plant (DCPP) instrument air system has identified several areas of concern.

These concerns are:

the existence of contaminants in the instrument air, insufficient procedural

guidance, insufficient preventive maintenance, insufficient surveillance testing, degraded air dryer desiccant, marginal back-up system capacity on four safety-related

valves, and insufficient air quality monitoring."

The PG&E letters discussed the programs that it has initiated to resolve these

concerns, and described how these programs address each of the above four items identified by Generic Letter 88-14.

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Mr. J.

D. Shiffer June 12, 1989 The NRC staff has reviewed the February 21 and June 6, 1989 letters and finds that they adequately address each of the recommendations of Generic Letter 88-14.

However, the staff notes that the instrument air systems have been and continue to be an area of relative weakness at Diablo Canyon.

A number of instrument air system deficiencies were identified in a special maintenance team inspection conducted by the staff on July 11 through 22, 1988

( reference Inspection Report Nos. 50-275/88-15 and 50-323/88-14, dated September 6, 1988).

Further, the staff Resident Inspectors for Diablo Canyon have advised us, and the June 6, 1989 PGSE letter.

has confirmed, that while the instrument air quality is consistent with the manufacturer's recommendations, considerable work remains to be done to assure that all issues associated with the air and nitrogen systems at Diablo Canyon are satisfactorily resolved.

Thus, while PGKE has in place programs to resolve all identified instrument air concerns, the'taff believes that.,continuing PGSE management attention should be placed on these programs to assure that all such concerns are resolved in a timely, aggressive, and thorough manner.

This fulfills your requirement in responding to Generic Letter 88-14, and completes NRC staff activities on TAC NOS.

71651 and 71652, and on Multi-Plant Action number 8-107 for Diablo Canyon.

As discussed in Generic Letter 88-14, when all the requirements of the letter have been implemented, you should provide written notification stating that all actions are complete.

Documentation assembled for this effort should be retained for at least two years for future audit by the staff. If you.have any questions regarding this matter, please contact me.

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

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Mr. J.

D. Shiffer June 12, 1989 The NRC staff has reviewed the February 21 and June 6, 1989 letters and finds that they adequately address each of 'the recommendations of Generic Letter 88-14.

However, the staff notes that the instrument air systems have been and continue to be an area of relative weakness at Diablo Canyon.

A number of instrument air system deficiencies were identified in a special maintenance team inspection conducted by the staff on July 11 through 22, 1988 (reference 'Inspection Report Nos. 50-275/88-15 and 50-323/88-14, dated September 6, 1988).

Further, the staff Resident Inspectors for Diablo Canyon have advised us',

and the June 6, 1989 PG&E letter has confirmed, that while the instrument air quality is consistent with the manufacturer's recommendations, considerable work remains to be done to assure that all issues associated with the air and nitrogen systems at Diablo Canyon are satisfactorily resolved.

Thus, while PG&E has in place programs to resolve all identified instrument air concerns, the staff believes that continuing PG&E management attention should be placed on these programs to assure that all such concerns are resolved in a timely, aggressive, and thorough manner.

This fulfillsyour requirement in responding to Generic Letter 88-14, and completes NRC staff activities on TAC NOS.

71651 and 71652, and on Multi-Plant Action number 8-107 for Diablo Canyon.

As discussed in Generic Letter 88-14, when all the requirements of the letter have been implemented, you should provide written notification stating that all actions are complete.

Documentation assembled for this effort should be retained for at least two years for future audit by the staff.

If you have any questions regarding this matter, please contact me.

Sincerely, original signed by cc:

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

Division of Reactor Projects - 111, IV, V and Special Projects Office of Nuclear Reactor Regulation DRSP/PD5

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Mr. J.

D. Shiffer Paci fic Gas and E 1 ectri c Company Diablo Canyon CC:

Richard F. Locke, Esq.

Pacific Gas 5 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 Box 1

San Luis Obispo, California 93406 Ms.

Nancy Culver 192 Luneta Street San Luis Obispo, California 93401 Xegional Administrator, Region V

U.S. Nuclear Regulatory Commission 1450 Maria Lane Suite 210 Walnut Creek, California 94596 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 j-rancisco,. 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 Wilshire Boulevard, Room 800 Los Angeles, California 90010 Dr. Gerard C.

Wong, Chief Radiological Materials Control Section State Department of Health Services 714 P Street, Office Building P8 Sacramento, California 95814

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