ML20069H882
| ML20069H882 | |
| Person / Time | |
|---|---|
| Site: | Shoreham File:Long Island Lighting Company icon.png |
| Issue date: | 04/07/1983 |
| From: | James Smith LONG ISLAND LIGHTING CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| SNRC-869, NUDOCS 8304120363 | |
| Download: ML20069H882 (3) | |
Text
_ ____
_ =
[
l LONG ISLAND LIGHTING COMPANY
- MampwJEdrtDPI SHOREHAM NUCLEAR POWER STATION g
f A-w.wwwa P.O. BOX 618, NORTH COUNTRY ROAD e WADING RIVER, N.Y.11792 D* ect Dul Number m
April 7, 1983 SNRC-869 Mr. Harold R.
Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Electrical Separation in NSSS Panels Shoreham Nuclear Power Station - Unit 1 Docket No. 50-322
Reference:
Letter SNRC-823 dated 1/21/S3
Dear Mr. Denton:
In the reference letter, LILCO advised that they were utilizing three options to' resolve the issue of separation of class lE and non-class lE circuits within the NSSS Panels.
The purpose of this letter is to further address and resolve NRC verbal questions regarding those circuits for which LILCO has chosen to utilize option number 2 as detailed in the reference letter.
This option involves the installation of redundant circuit protection for non-lE circuits which are in close promimity to Class lE (essential) circuits in the NSSS panels.
The following criteria will be applied:
In those circuits where redundant protective devices are utilized, they will be appropriately sized and located so that the worst fault condition postulated would not prevent the proper functioning of Class lE (essential) circuits.
The worst case condition L
postulated encompasses the following:
l 1)
Open Circuit l
.2)
Short Circuit l
3)
Transients and Electromagnetic Interference (EMI)
The analyses assume the application of the maximum credible I
fault, voltage line-to-line, and line-to-ground. Short circuits will be cleared by either the primary or the redundant backup 8304120363 830407 PDR ADOCK 05000322 A
[f FC-8935,1
p e
- April;7, 1983 SNRC-869 Page 2 protective device.
.In theory, fault currents generated prior to clearing-byEfuse or circuit breaker could induce EMI in adjacent Class lE circuits.
An evaluation of the worst case circuit assuming perfect coupling between a parallel pair of conductors.(faulted non-Class lE.to Class lE wiring) reveals a negligible induced voltage.on-the Class lE circuit.
The information furnished herein should be sufficient to alleviate any remaining staff concerns on this issue.
Should' you have any questions please contact this office.-
Very truly yours, J. L.
Smith Manager, Special-Projects Shoreham Nuclear-Power Station RWG:bc-cc:
J.
Higgins All Parties Listed-in Attachment 1 4
s t
w~_..-
m=---._
.m X
ATTACHMENT 1' Lawrence Brenner, Esq.
' Herbert H. Brown, Esq.
Administrative. Judge Lawrence Coe Lanpher, Esq.
Atomic Safety and Licensing Karla J.
Letsche, Esq..
Board Panel.
Kirkpatrick, Lockhart,' Hill U.S. Nuclear Regulatory Commission Christopher & Phillips Washington, D.C.
20555 8th Floor 1900 M Street, N.W.
Washington, D.C.
20036-Dr. Peter A. Morris Administrative Judge Atomic Safety and Licensing Mr. Marc W.
Goldsmith Board Panel Energy Research' Group U.S. Nuclear Regulatory Commission 4001 Totten Pond Road Washington, D.C.
20555 Waltham, Massachusetts 02154 Dr. James H.
Carpenter MHB Technical Associates Administrative Judge 1723 Hamilton Avenue Atomic Safety and Licensing Suite K Board Panel San Jose, California 95125 U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Stephen B.
Latham, Esq.
Tuomey, Latham & Shea Daniel F.
Brown, Esq.
33-West Second. Street Attorney P.O. Box 398 Atomic Safety and Licensin9 Riverhead, New York '11901' Board Panel U.S. Nuclear-Regulatory Commission Washington,.D.C.
20555 Ralph Shapiro,-Esq.
Cammer and Shapiro, P.C..
-9 East 40th' Street Bernard M. Bordenick, Esq.
New York, New York' 10016-David A.
Repka,.Esq.
U.S. Nuclear Regulatory Commission Washington,JD.C. -20555 Matthew 'J. Kelly-, Esq. -
State ofcNew' York
-James-Dougherty Departmentlof-Public Service 13045 Porter Street 1 Three Empire State Plaza
washington,~D.C.
20008
- Albany,NewYork-12223 1
m p
I
%.y C
? k.;
w
^&
.