ML20041D120
| ML20041D120 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 02/10/1982 |
| From: | Clark R Office of Nuclear Reactor Regulation |
| To: | William Jones OMAHA PUBLIC POWER DISTRICT |
| Shared Package | |
| ML20041D122 | List: |
| References | |
| GL-81-14, NUDOCS 8203040309 | |
| Download: ML20041D120 (5) | |
Text
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s Mr. U. C. Jones RECE!VED Division Manager, Production D
FEB 2219825 i Operations n um rtum,%, p 6
Omaha Public Power District g'>h'fyfC mm%c 1623 Harney Street
/w Omaha, Nebraska 68102 6'
Dear Mr. Jones:
1 This letter is in regard to our Generic letter 81-14 entitled " Seismic Qualification of Auxiliary Feodwater Systems" which was forwarded to you on February 10, 1981. OPPD responded to this letter on July 14,1981, and provided supplemental information in letters dated September 14,1981 and January 8, 1982. We have written a Safety Evaluation Report based on your submittals (enclosed).
It concludes that the Safe Shutdown Earthquake (SSE) seismic qualification of the appropriate portions of the Fort Calhoun Unit 1 auxiliary feedwater system is consistent with that of other safety grade systems at the facility provided that four corrective actions are taken.
The four corrective actions are (a) add an additional support bo the electrical supply conduit which provides service to the motor of AFW Pump FU-6, (b) replace existing support rods for valve operators on small bore piping with a r: ore stable support, (c) add pipe restraints on amall bore piping (cold system), and (d) add pipe restraints on small bore piping (hot system) if a detailed pipe stress analysis concludes that such additional supports will not have a detrimental thercal impact on the AFU system.
Subsequent to the oormletion of our SER, E. G. Tourigny of my staff contacted T. Patterspn and R. Short of your staff to ascertain the status of the above four corrective actions.
It is our understanding that corrective actions a-c are completed.
It is also our understanding that a detailed pipe stress analysis as discussed in item (d)was performed and additional pipe restraints s
on small bore piping (hot system) were added per the conclusions of the
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. Based on the above, we conclude that there is reasonable assurance that the auxiliary feedwater system will function follwing the occurrence of earthquakesuup to and including the SSE for the plant, fio further actions are required on the part of Omaha Public Power District for the Fort Calhoun Station, Unit 1, and this letter corpletes this matter.
Sincerely,
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He~' t A. Clark Robert A. Clark, Chief Operating Reactors Branch #3 Division of Licensing
Enclosure:
As stated cc:
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FEB 101982 Docket No. 50-285 Mr. W. C. Jones Division Manager, Production Operations Omaha Public Power District 1623 Harney Street Omaha, Nebraska 68102
Dear Mr. Jones:
This letter is in regard to our Generic Letter 81-14 entitled " Seismic Qualification of Auxiliary Feedwater Systems" which was fcrwarded to you on February 10, 1981. OPPO responded to this letter on July 14, 1981, and provided supplemental information in letters dated September 14,1981 and January 8,1982. We have written a Safety Evaluation Report based on your submittals (enclosed).
It concludes that the Safe Shutdown Earthquake (SSE) seismic qualification of the appropriate portions of the Fort Calhoun l
Unit 1 auxiliary feedwater system is consistent with that of other safety grade systems at the facility provided that four corrective actions are taken.
~
The four corrective actions are (a) add an additional support to the electrical supply conduit which provides service to the motor of AFW Pump FW-6, (b) replace existing support rods for valve operators on small bore piping with a more stable support, (c) add pipe restraints on small bore piping (cold system), and (d) add pipe restraints on small bore piping (hot system) if a detailed pipe stress analysis concludes that such additional supports will not have a detrimental thermal impact on the AFW system.
Subsequent to the completion of our SER, E. G. Tourigny of my staff contacted T. Patterson and R. Short of your staff to ascertain the status of the above four corrective actions.
It is our understanding that corrective actions a-c are completed.
It is also our understanding that a detailed pipe stress analysis as discussed in item (d)was performed and additional pipe restraints on small bore piping (hot system) were added per the conclusions of the study.
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2-Based on the above, we conclude that there is reasonable assurance that the auxiliary feedwater system will function following the occurrence of No further actions earthquakes up to and including the SSE for the plant.
are required on the part of Omaha Public Power District for the Fort Calhoun Station, Unit 1, and this letter completes this matter.
Sincerely.
- ~ '(
.c w Robert A. Clark, Chief Operating Reactors Branch #3 Division of Licensing
Enclosure:
As stated cc: See next page
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Omaha Pubite Power District cc:
Marilyn T. Shaw, Esq.
LeBoeuf, Lamb, Leiby & MacRae 1333 New Hampshire Avenue, N.W.
Washington, D. C.
20036.
Mr. Jack Jens'n -
e Chairman, Washington County Board of Supervisors Blair, Nebraska 68023 U.S. Environmental Protection Agency Region VII ATTN: Regional Radiation Representative 324 East lith Street Kansas City, Missouri 64106 Mr. Frank Gibson W. Dale Clark Library 215 South 15th Street Omaha, Nebraska 68102 Alan H. Kirshen, Esq.
Fellman, Ramsey & Kirshen 1166 Woodmen Tower Omaha, Nebraska 68102 Mr. Larry Yandel.1 U.S.N.R.C. Resident Inspector P. O. Box 309 Fort Calhoun, Nebraska 68023 Mr. Charles B. Brinkman Manager - Washington Nuclear Operations C-E Power, Systems Combustion Engineering, Inc.
4853 Cordell Avenue, Suite A-1 Bethesda, Maryland 20014 Regional Administrator Nuclear.Rigulatory Commission, Region IV' t
Office of Inspection and Enforcement 611 Ryan Plaza Drive Suite 1000-Arlington, Texas 76011
.