ML20151M250

Discusses Seismic Qualification of Air Accumulators & Control Valves.Nrc Guidelines for Control & Maint of Equipment Seismic Qualification Documents Did Not Exist Until Early 1980 When Review Team Began Plant Site Audit

ML20151M250
Person / Time
Site:	Fort Calhoun
Issue date:	07/28/1988
From:	Calvo J Office of Nuclear Reactor Regulation
To:	Morris K OMAHA PUBLIC POWER DISTRICT
References
NUDOCS 8808050059
Download: ML20151M250 (6)

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1. 'o UNH ED STATES

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W ASHINGTON, D. C. 20555

%, . . . . + #' July 28',1988 Docket No. 50-285 Mr. Kenneth J. Morris Division Manager - Nuclear Operations Omaha Public Power District 1623 Harney Street Omaha, Nebraska 68102-2247

SUBJECT:

SEISMIC QUALIFICATION OF AIR ACCUMULATORS AND CONTROL VALVES

References:

(1)NRCLettertoOPPD,J.CalvotoR.Andrews, dated December 15, 1988 (2)OPPDLettertoNRC,LIC-87-803,R.AndrewstoJ.Calvo, dated November 25, 1987 As stated in reference (1), the longer term seismic problem that was discussed during the water intrusion into the instrument air system event was to be addressed in future correspondence. This problem area dealt with your inability to provide documentation to confirm the seismic qualification of air accumulators and the associated air operated valves in accordance with the requirements in the Fort Calhoun Updated Safety Analysis Report (USAR).

Omaha Public Power District (OPPD) had stated, in reference (2), that it was not able to locate any test reports confirming seismic qualification of these valves and operators. It is noted, however, that specific NRC staff guidelines for the control and maintenance of equipment seismic qualification

, documents did not exist until early 1980 when the Seismic QualificP. ion Review Team (SQRT) began its intensive, indepth plant site audit for near tenn operating license plants. OPPD has proposed to delay the demonstration

- of the seismic qualification of any required air operated valve until the resolution of Unresolved Safety Issue (USI) A-46. OPPD has stated that, under the resolution of USI A-46, any required air operated valve would be seismi: ally evaluated. This issue is an ongoing program and its final resolution is not expected until 1989, after which the implementation of the resolution would begin.

The staff has arrived at the following conclusions regarding Fort Calhoun:

a. At the time of the plant design, all safety-related valves were required to be seismically qualified.

b. Although 10 CFR Part 50, Appendix B, was in effect at the time of plant construction, specific guidelines on the maintrmance of equipment seismic qualification documents did not exist.

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Omaha Public Power District July 28,1988

c. OPPD is presently undertaking an extensive program to reconstitute the Fort Calhoun Design Basis and will continue to attempt to locate any infonnation to substantiate the statements in the USAR.

d. Most of the equipment installed in the plant is in service in other nuclear, as well as fossil units, which either have adequate documentation or have survived ground shaking of actual strong earthquakes in the past.

e. Fort Calhoun site is located in a relatively low seismicity zone as compared to some other nuclear facilities.

Therefore, the staff considers your proposal to delay the resolution of the seismic qualification of equipment until the resolution of USI A-46 to be satisfactory, subject to the following conditions. Prior to the completion of the USI A-46 implementation, should an earthquake of Design Earthquake acceleration level or higher occur at the Fort Calhoun site, all the safety-related equipment in the plant should undergo an intensive inspection and evaluation for structural integrity. Aho, for active components, OPPD should ensure the functional operability before the restart of the plant from this event. Finally, once the generic resolution of USI A-46 is complete, an aggressive schedule for the implementation of the resolution is required to be submitted to and approved by the NRC.

Sincerely, a.' ll . 0d%

Jose A. Calvo, Director Project Directorate IV .

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

l Mr. R. L. Andrews Fort Calhoun Station Omaha Public Power District Unit No 1 I

cc:

Harry H. Voigt, Esq.

LeBoeuf, Lamb, Leiby & MacRae 1333 New Hampshire Avenue, NW Washington, D.C. 20036 Mr. Jack Jensen, Chairman Washington County Board of Supervisors Blair, Nebraska 68008 Mr. Phillip Harrell, Resident Inspector U.S. Nuclear Regulatory Commission P. O. Box 309 Fort Calhoun, Nebraska 68023 Mr. Charles B. Brinkman, Manager Washington Nuclear Operations C-E Power Systems 7910 Woodmont Avenue Bethesda, Maryland 20814 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Office of Executive Director for Operations 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 Harold Borchert, Director Division of Radiological Health Department of Health 301 Centennial Mall, South P.O. Box 95007 Lincoln, Nebraska 68509 W. G. Gates, Manager Fort Calhoun Station P. O. Box 399 Fort Calhoun, Nebraska 68023

Omaha Public Power District -2 July 28,1988

c. OPPD is presently undertaking an extensive program to reconstitute the Fort Calhoun Design Basis and will continue to attempt to locate any information to substantiate the statements in the USAR.

d. Most of the equipment installed in the plant is in service in other nuclear, as well as fossil units, which either have adequate documentation or have survived ground shaking of actual strong earthquakes in the past.

e. Fort Calhoun site is located in a relatively low seismicity zone as compared to some other nuclear facilities.

Therefore, the staff considers your proposal to delay the resolution of the seismic qualification of equipment until the resolution of USI A-46 to be satisfactory, subject to the following conditions. Prior to the completion of the USI A-46 implementation, should an earthquake of Design Earthquake acceleration level or higher occur at the Fort Calhoun site, all the safety-related equipment in the plant should undergo an intensive inspection and evaluation for structural integrity. Also, for active components, OPPD should ensure the functional operability before the restart of the plant from this event. Finally, once the generic resolution of USI A-46 is complete, an aggressive schedule for the implementation of the resolution is required to be submitted to and approved by the NRC.

Sincerely.

ORIGINAL SIGNED BY JOSE A. CALVO Jose A. Calvo, Director Project Directorate IV Division of Reactor Project - III, IV, Y and Special Projects Office of Nuclear Reactor Regulation cc: See next page DISTRIBUTION Docket File NRC PDR Local PDR PD4 Reading L. Rubenstein J. Calvo P. Noonan P. Milano OGC-Rockville E. Jordan B. Grimes ACRS (10)

L. Marsh PD4 Plant File

• See previous concurrence

• PD4/LA *PD4/PM *C:EMEB PD4/D d46 PNoonan PMilano LMarsh JCalvo 07/22/88 07/22/88 07/26/88 07/2f/88

.O Omaha Public Power District July 28,1988

c. OPPD is precently undertaking an extensive program to reconstitute the Fort Calhoun Design Basis and will continue to attempt to locate any information to substantiate the statements in the USAR.

d. Most of the equipment installed in the plant is in service in other nuclear, as well as fossil units, which either have adequate documentation or have survived. ground shaking of actual strong earthquakes in the past.

e. Fort Calhoun site is located in a relatively low seismicity zone as compared to some other nuclear facilities.

Therefore, the staff considers your proposal to delay the resolution of the seismic qualification of equipment until the resolution of USI A-46 to be satisfactory, subject to the following conditions. Prior to the completion of the USI A-46 implementation, should an earthquake of Design Earthquake acceleration level or higher occur at the Fort Calhoun site, all the safety-related equipment in the plant should undergo an intensive inspection and evaluation for structural integrity. Also, for active components, OPPD should ensure the functional operability before the restart of the plant from this event. Finally, once the generic resolution of USI A-46 is complete, an aggressive schedule fo' the implementation of the resolution is required to be submitted to and approved by the NRC.

Sincerely, ORIGINAL SIGNED BY JOSE A. CALVO Jose A. Calvo, Director Project Directorate IV Division of Reactor Project - III.

IV, Y and 'o ecial Projects Office of Nuclear Reactor Regulation c,. ; Re next page DISTRIBUTION

<Docketf.ile . ? NRC PDR Local PDR PD4 Reading L. Rubenstein J. Calvo P. Noonan P. Milano OGC-Rockville E. Jordan B. Grimes /.CRS (10)

L. Marsh PD4 Plant File

• See previous concurrence N(,,

• PD4/LA *PD4/PM *C:EMEB PD4/D /

PNoonan PMilano LMarsh JCalvo 07/22/88 07/22/88 07/26/88 07/24/88 fol llp

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Omaha Public Power District c. OPPD is presently undertaking an extensive program to reconstitute the Fort Calhoun Design Basis. The licensee will continue to attempt to locate any information to substantiate the statements in the USAR.

d. Most of the equipment installed in the plant is in service in other nuclear, as well as fossil units, which either have adequate documentation or have survived ground shaking of actual strong earthquakes in the past.

c. Fort Calhoun site is located in a relatively low seismicity zone as compared to some other nuclear facilities.

Therefore, the staff considers the proposal to delay the resolution of the seismic qualification of equipment until the resolution of USI A-46 to be satisfactory, subject to the following conditions. Prior to the completion of the USI A-46 implementation, shculd an earthquake of Design Earthquake acceleration level or higher occur at the Fort Calhoun site, all the safety-related equipment in the plant should undergo an intensive inspection and evaluation for structural integrity. Also, for active components, OPPD should ensure the functional operability before the restart of the plant from this event. Finally, once the generic resolution of USI A-46 is complete, an aggressive schedule for the implementation of the resolution is required to be submitted to the NRC.

Sincerely, Jose A. Calvo, Director Project Directorate IV Division of Reactor Project - III, IV, Y and Special Projects Office of Nuclear Reactor Regulation ec: See next page DISTRIBUTION Docket File NRC PDR Local PDR PD4 Reading L. Rubenstein J. Calvo P. Noonan P. Milano OGC-Rockville E. Jordan B. Grimes ACRS(10)

L. Marsh PD4 Plant File 6.~Y PD4/L$ PD4/PM C:EM PD4/D PNoona PMilano LMarsh JCalvo 07/p88 07/u/88 07/ph88 07/21/88

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