ML20211Q870
| ML20211Q870 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 07/22/1986 |
| From: | Kuncl L NEBRASKA PUBLIC POWER DISTRICT |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20211Q875 | List: |
| References | |
| NUDOCS 8607280034 | |
| Download: ML20211Q870 (3) | |
Text
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GENERAL OFFICE Nebraska Public Power District
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July 22, 1986 Director of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Attention:
Mr. Harold Denton
Dear Mr. Denton:
Subject:
10CFR50.71 Revision 4 of USAR Cooper Nuclear Station NRC Docket No. 50-298, DPR-46 Pursuant to 10CFR50.71, Nebraska Public Power District hereby submits one (1) original and twelve (12) copies of the fourth revision (dated July 22, 1986) of the USAR for Cooper Nuclear Station.
This revision reflects changes made since the last submittal of the USAR and is current for completed work g) es of January 22, 1986.
(LJ An identification of changes made under the provisions of 10CFR50.59 but not previously submitted to the Commission are as follows:
Design Change 82-079 This Design Change authorized replacement of essential fan motors (exhaust fans) on the Standby Gas Treatment System as part of the effort to qualify Class I electrical equipment in Cooper Nuclear Station to NRC IE Bulletin 79-01B requirements.
The fans driven by these motors provide the flow through the SGT system.
Design Change 84-138 This Design Change authorized modification of the Reactor Recirculation suction and discharge valve reactor side discs so that hydraulic locking of the valve discs cannot occur.
The modification involved drilling 3/16-inch diameter holes in the subject reactor side discs, thereby providing a vent path for the volume of water between the valve discs.
Design Change 84-180 This Design Change authorized the installation of equipment to provide the capability to operate the diesel generators from the local panel and l
f7 to isolate the control cables associated with diesel generators between y!
diesel generator rooms and Vertical Board "C" in the Main Control Room.
This isolation is accomplished by installation of two-position isolation 8607280034 860722 PDR ADOCK 05000298 K
Mr. Harold Denton Prge 2 July 22,1986 i
switches on the Diesel Engine Panel.
The isolation switches allow operation of the diesel generator when its cables are damaged or destroyed by a fire.
Also, Revision 3 of the USAR included two revisions as a result of design changes, and it has been determined that the work on these changes has not actually been completed.
As a result, previously incorporated revisions for these two changes are being removed.
The two concerned changes are as follows:
Design Change 83-23 This change would have provided for the installation of an additional vacuum breaker in the HPCI exhaust line.
Completion of this modification is planned for a later date.
Design Change 83-92 This change would upgrade the screen wash system in the intake structure by change out of screen wash pumps and installation of some new strainers and piping.
Present plans are to complete these modifications at a later date.
The next revision of the USAR will be submitted on or before July 22, 1987.
Additionally, Attachment I is a List of Effective Pages for the Fourth Revision of the USAR 'and should be inserted behind this letter after the front cover of Volume I in place of the letter and List of Effective Pages for the Third Revision.
Sincerely, M
L. G. Kuncl Vice-President, Nuclear LGK/gme:lk24/9(USAR)
Enclosure OO we mmm g
Mr. Ilarold Denton Page 3 July 22, 1986 j
STATE OF NEBRASKA)
)ss PLATTc COUNTY
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L. G. Kuncl, being first duly sworn, deposes and says that he is an authorized representative of the Nebraska Public Power District, a public corporation and political subdivision of the State of Nebraska; that he is duly authorized to submit this information on behalf of Nebraska Public Power District; and that the statements contained herein are true to the best of his knowledge and belief.
tO WYivdk L. G. Kunel Subscribed in my presence and sworn to before me this day of d,0n
, 1986.
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