ML19345D189
| ML19345D189 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 11/04/1980 |
| From: | Swart F PUBLIC SERVICE CO. OF COLORADO |
| To: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| P-80391, NUDOCS 8012120152 | |
| Download: ML19345D189 (2) | |
Text
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d November 4, 1980 5
Fort St. Vrain Unit No. 1 P-80391 Ef.i
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w Mr. Karl V. Seyfrit, Director Nuclear Regulatory Commission Region IV Office of Inspection and Enforcement 611 Ryan Pla:a Drive m
Suite 1000 K.;.>
,t Ar1ington, Texas 76012 a
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Subject:
Class IE and Non C ass 1E Instrument Suses
Reference:
Letter Swart to Seyfrit (P-80240) dated 7/31/80
Dear Mr Seyfrit:
In the above refe enced letter, PSC stated that the NRC staff wcald be advised of any sc edule problems regarding PSC's proposed instrument bus modifications.
Tl e status of our previous commitments are as follows:
1.
Addition of undervoltage alarm to 120 VAC Noninterruptible Bus 3:
The engineering is complete on this project and all material has been procured.
Installation will take place as soon as plant conditions allow.
2.
Addition of automatic transfer switches to Noninterruptible Suses i
1,2,&3 and to Interruptible Buse 3:
PSC has pursued procurement of original equipment manufacturer modification kits to achieve the desired automatic tnrow over.
These kits could not be provided with the necessary seismic qualifications.
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3012120152 Q
P-80291
'4cvember 4,1980 Page 2 PSC nas reevalua:ed anc is now pursuing purchase of seismically qualified throw over devices in separate enclosures.
Due to forthcoming plant i
- modifications, PSC is also increasing the capacity of Noninterruptible Bus 3.
These modifications will require a plant outage of several days and are being rescheduled for the Fort St. Vrain second refueling outage plannad for September 1981.
Please contact us if you have any questions on this matter.
Very truly yours,
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Frederic E. Swart Nuclear Project Manager FES/ MEN:pa 4
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