1CAN108104, Forwards Emergency Feedwater Sys Upgrade Reliability Analysis
| ML20032A419 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 10/07/1981 |
| From: | Trimble D ARKANSAS POWER & LIGHT CO. |
| To: | Stolz J Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20032A420 | List: |
| References | |
| 1CAN108104, NUDOCS 8110290510 | |
| Download: ML20032A419 (1) | |
Text
_
ARKANSAS POWER & LIGHT COMPANY POST OFFICE BOX 551 LITTLE ROCK ARKANSAS 72203 (501)371-4000 October 7, 1981 1CAN108104 O
D Director of Nuclear Reactor Regulation s
ATTN:
Mr. J. F. Stolz, Chief 6
p[rp.b 9,
s Light Water Reactors Branch #1 i
L.IJ W U. S. Nuclear Regulatory Commission
~
( OCT2 81981a_$
Washington, D. C.
20555
SUBJECT:
Arkansas Nuclear One - Unit 1 EUEEi" l
pg
_.f Docket No. 50-313 License No. DPR-51 3
n EFW Upgrade fd (File:
1510.3)
Gentlemen:
As stated in our October 15, 1980 letter, a detailed reliability analysis was performed for the EFW system upgrade.
A copy of this analysis is attached for your information.
It should be noted that we are addressing the recommendations made in the attached reliability analysis.
Also, the values given for unavailability in the analysis are not absolute ar i are only for comparison purposes with results obtained by similar methodology.
As you are aware, we are presently revising the design of our EFW system to comply with item II.E.1.2 of NUREG 0737.
Design improvements are planned using Standard Review Plan Section 10.4.9 and the assuciated Branch Technical Position ASB 10-1 as principle guidance.
Design changes intended to improve reliability are being assessed in terms of cost / benefit since no specific reliability goal exists.
Very truly yours, xYLtrO.(, r)k rd.f) i 7
U David C. Trimbic Manager, Licen.iru DCT:
- MCS:sc Attachment 9\\
puTeu JATag MEMBER M100LE SOUTH UTILITIES SYSTEM p
~
-