ML17037C556
| ML17037C556 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  (DPR-017) |
| Issue date: | 01/26/1973 |
| From: | Burt P Niagara Mohawk Power Corp |
| To: | Skovholt D US Atomic Energy Commission (AEC) |
| References | |
| Download: ML17037C556 (8) | |
Text
AEC DISTRIBUTIoim FOR PART 0 DOCKET MATERIAL TEMPORARY FORM
~ - CONTROL.No:
714 FROM:
Niagra Mohawk Power Corporation Lycoming, New York 13093
, P ~ A. Burt DATE OF DOC:
01-26-73 DATE REC'D 01-30-73 X
FX MEMO TO:
Donald J. Skovholt ORIG CC SENT AEC PDR X
SENT LOCAL PDR
. X CLASS:
PROP INFO No CXS REC'D DOCKET No:
DESQRXPTXON:
Ltr furnishing info regarding the NMP Fitzpatrick g4 transmission line to,run between the JAPNPP 115 KV bus and the NMPNS Unit 81 115 KV bus w/attached Figure l... ~ ~
50-220 1
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'JAN301973T 4
REGUULTORY IIQIL SECTION DOCKIT CORK Nine Mile Point Nuclear Station Post Office Box 32 Lycoming, New York 13093 January 26, 1973 Mr. Donald J. Skovholt Assistant Director for Reactor Operations Division of Reactor Licensing United States Atomic Energy Commission Nashington, D. C.
20S45
Dear,
Mr. Skovholt:
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'Sgf Re.:
Provisional Operation License:
DPR-17 Docket No.:
50-220 The permanent alignment of the 115 KV transmission lines, to provide incoming power for both the, James A. FitzPatrick Nuclear Power Station and the Nine Mile.Point Nuclear Station Unit gl, calls for a transmission line
'etween the two plants.
This line,'MP-FitzPatrick ¹4 will'run between the JAFNPP 115 KV bus 'and the NMPNS Unit ¹1 115 KV bus, and will replace the existing NMP-Light House Hill ¹4 incoming llS KV feed to NMPNS Unit ¹1, Following a thorough review, it has been deemed necess'ary to temporarily energize the James A. FitzPatrick 115 KV bus from the existing Oswego-NMP ¹1 11S KV transmission line utilizing the NMP-FitzPatrick ¹4 115 KV transmission line.
See Figure 1.
This temporary connection of the 115 KV circuits is necessary to realign the Nine Mile Point Site 115 KV incoming power transmission lines in conformance with that,presented in J.A.F.
FSAR Volume IV, Section 8.
Once the temporary connection is made and the James A. FitzPatrick llS KV bus energized the existing FitzPatrick - Light House Hill ¹4 Transmission line will be disconnected.
This temporary alignment will minimize the length of time 'that any one of the two 115 KV transmission lines that provide incoming power to Nine Mile Point Nuclear Station Unit ¹1 are out of service.
The 115 KV temporary tie line be'tween the FitzPatrick Plant and NMPNS is designed to equal. or exceed the requirements of the existing incoming lines,.
Protective relaying will be provided for automatic tripping of the circuit breakers under fault conditions.
Most line faults are transient in nature, therefore, automatic reclosing equipment and circuitry is provided to re-energize the lines after the extremely short interruption required to clear the fault.
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'Mr. Donald J. Skovholt U.S. Atomic Energy Commission January 26, 1973 The temporary connection to the Oswego-NMP ¹1 115 KY transmission line will result in the NMP-FitzPatrick ¹4 115 KV transmission line being perpen-dicular to, and directly under the present NMP-Light House Hill ¹4 115 KV transmission line.
'n the event of a catastrophic failure of the NMP-Light House Hill
¹4 line, resulting in those conductors falling on the temporary 115 KV feed thru NMP-FitzPatrick ¹4 to the FitzPatrick 115 KV Bus, H.t is conceivable that the temporary 115 KV feed conductors would be burned away.
The resulting work required to cut away the temporary 115 KV conductors from the Oswego-NMP ¹1 transmission line would be four (4) hours.
During this period of time, with both 115 KV transmission lines out of service, Technical Specification 3.6.3 e.2 would apply.
The specification states that both diesel-generator power systems shall be operable with one diesel-generator running. If one of the two 115 KV transmission lines, is not available after 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, a normal orderly shutdown'ill be initiated within one hour.
No undue or unresolved safety hazard is presented Py this temporary connection.
It is expected that this temporary alignment will remain for a maximum of four (4) weeks.
In addition, it shall be verified that both diesel-generators are operable prior to initiating work on the temporary connection.
Very truly yours, P.
A. Burt General Superintendent Nuclear Generation PAB/cm
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