ML20073P650
| ML20073P650 | |
| Person / Time | |
|---|---|
| Site: | Shoreham File:Long Island Lighting Company icon.png |
| Issue date: | 04/22/1983 |
| From: | James Smith LONG ISLAND LIGHTING CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| SNRC-872, NUDOCS 8304270030 | |
| Download: ML20073P650 (3) | |
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6 ##Edip p gwana SHOREHAM NUCLEAR POWER STATION m,memmj P.O. BOX 618, NORTH COUNTRY ROAD e WADING RIVER, N.Y.11792 Dkut Dbl humkr April 22, 1983 SNRC-872 Mr. Harold R.
Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C.
20555 SER Issure No. 47 - Control System Failures Shoreham Nuclear Power Station - Unit 1 Docket No. 50-322
Reference:
(1)
Letter SNRC-761 dated 8/27/82 (2)
Letter NRC (A. Schwencer) to LILCO (M.
S. Pollock) dated 11/24/82
Dear Mr. Denton:
As stated in section 7.7 of Supplement No. 1 to the Shoreham Safety Evaluation Repcrt (SER) the Long Island Lighting Company had committed to conduct a review to demonstrate that failures or malfunctions of power sources or sensors providing power or signals to two or more control systems will not result in conse-quences outside the bounds of the FSAR Chapter 15 analyses or beyond the capability of operators or safety systems.
In fulfillment of this commitment,-LILCO, via the reference (1) letter, had forwarded a report entitled " Control System Failures Evaluation Report','.
This report concluded that, although new transient category events can be postulated by considering these failures or malfunctions, the net effects have been positively determined to be less severe than those of the original, conserva-tive Chapter 15 events.
Per the reference (2) letter, the staff conducted a preliminary review of this report and determined that, while the report appeared to satisfactorily address the effects of power supply failures, it did not address control system failures caused by common sensors such as hydraulic headers and impluse lines.
In this reference (2) letter, a request for information containing 3 items was included as Enclosure 1.
Items 1 and 2 of this request involve the identification of control systems whose failure or malfunction could impact plant safety and further identification of the control systems noted above which receive power from common 8304270030 830422 PDR ADOCK 05000322
{
E PDR FC 8935.1
April 22, 1983
.Mr. Harold R.JDenton SNRC-872 Page 2 power sources.
LILCO has determined that Sections 3.2 and 3.5
'of the Ref. l report address these items, and no additional changes
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are required.. Item 3 of this request involves control system failures caused by common sensors, common hydraulic headers or common impluse lines. ' Control' system failures caused by common sensors
.are enveloped by the Ref. 1 report,'and no further revisions are required. -This report did'not however, address control system failures caused by common hydraulic headers or common impluse lines.
LILCO had--informed the staff that these failures.would be evaluated and any. problems would be summarized in a preliminary report, with a final report to be submitted 45 days later.
The.-purpose of;thisEletter isoto serve as the-above mentioned ~ pre-
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liminary _eport and advise the staff that'an evaluation has-been performed as required for control system failures caused by common hydraulic-headers *or. common.impluse lines.
This evaluation has
. led to the conclusion that these< failures will not result in con-sequences outside the bounds of the FSAR Chapter 15 analyses or beyond the capability of' operators or safety. systems.
'A final report is presently being completed and will be submitted to the staff by mid-May. 'This report will be in the form of a supplement to the report submitted in Ref. 1.
Please advise if.you have any questions on this matter.
Very truly yours, (f
[ l-.
- b M i T k 4
J.
L'. Smith Manager, Speical Projects Shoreham Nuclear Power Station RdG:bc cc:
J. Higgins All Parties Listed in Attachment 1
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ATTACH."EN"' 1
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Lawrence Brenner, Esq.
'ilerbert H. Brown, Esq.
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Administrative Judge Lawrence Coe Lanpher, Esq. -
. Atomic Safety and Licensin9 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.
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Washington, D.C.
20036 Dr. Peter A. Morris Administrative Judge
" Atomic Safety and Licensing Mr. Marc U.
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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.
Twomey, Latham & Shea Daniel P.
Brown, Esq.
33 West Second. Street Attorney P.O. Box 39S Atomic Safety and Licensing Riverhead, New York 11901 Board Panel U.S. Nuclear Regulatory Commission
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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, D.C.
20555 Matthew J.
Kelly, Esq.
State of New York James Dougherty ~
Department of Public Service 3045 Porter Street Three Empire State Plaza Washington, D.C.
20003
' Albany, ::cw York 12223 e
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