ML18082A676
| ML18082A676 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 06/18/1980 |
| From: | Schwencer A Office of Nuclear Reactor Regulation |
| To: | Mittl R Public Service Enterprise Group |
| References | |
| NUDOCS 8007070109 | |
| Download: ML18082A676 (4) | |
Text
Distribution JUN 1 8 1980 Docket Fi 1 e NRC PDR Local PDR LB #3 DEisenhut RPurple NSIC TIC ACRS(l6)
Docket No. 50-311 RTedesco
- ~'-'-...
ASchwencer JLee JKerrigan Mr. R. L. Mittl, General Manager R~Mattson Licensing and Environment SHa~auer Engineering and Construction Department JKni ght Public Service Electric and Gas CompanyVAMoore 80 Park Place WKreger.
Newark New Jersey 07101 MLErnst RPDenise
Dear Mr. Mittl:
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SUBJECT:
ECCS SWITCHOVER DESIGN CRITERIA (Salem Nuclear Generating Station, Unit No. 2)
As stated in Supplement 4 to the Safety Evaluation Report (SER) related to opera-tion of the Salem Nuclear Generating Station, Unit 2, we have re-evaluated the manual ECCS switchover approved in Supplement l to the SER.
The manual procedure continues to be acceptable based on analyses of time available for operator response.
However, our position is that the switchover to the recirculation mode be automated during the longer term to reduce the operator manual actions needed subsequent to a loss-of-coolant accident.
We, therefore, require thatthe manual switchover actfons be replaced with an automatic design complying with the enclosed criteria. Your proposed conceptual design should be submitted within 90 days of the date of issuance of Supplement 4 to the SER.
In your submittal, you should identify each proposed design change and commit to a schedule for submittal of a final design package for staff review.
Please contact us if you have any additional questions on this matter.
Sincerely,.
A. ~~~r, Acting Chief Licensing Branch No. 3 Division of Licensing
Enclosure:
As Stated ccs w/enclosure:
See next page 80 0 7 0 7*0109 E
DL:LB #3 DL:LB
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DATE ~..... 6/.. / 80.......... 6 /.. '/ 8.Q...........................................................................
NRC FORM 318 (9-76) NRCM 0240
- u.s. GOVERNMENT PRINTING OFFICE: 1979-289*369
.. *~* -..
e e
UNIT.ED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 Docket No.
50~311 Mr. R. L. Mittl, General Manager Licensing and Environment JUN 1 8 1980 Engineering and Constructi~n Department Public Service Electric and Gas Company 80 Park Place Newark, New Jersey 07101
Dear Mr. Mittl :
sueJECT:
ECCS SWITCHOVER DESIGN CRITERIA (Salem Nuclear G~nerating Station, Unit No~ 2)
As stated in Supplement 4 to the Safety Evaluation Report (SER) related to opera-tion of the Salem Nticlear Generating Station, Unit 2, we heve re-evaluated the manual ECCS switchover approved in Supplement 1 to the SER.
The manual procedure continues to be acceptable based on analyses of time available for operator response.
However, our position is that the switchover to the recirculation mode be automated during the longer tenn to reduce the operator manual actfons needed subsequent to a loss-of-coolant accident.
We, therefore, require that the manual switchover actions be replaced with an
?Utomatic design*complying with the enclosed criteria. Your proposed conceptual des.ign should be submitted within 90 days of the date of issuance of Supplement 4
- to the SER.
In your submittal, you.should identify each proposed* design change and commit to a schedule for submittal of a final design package for staff review.
Please contact us if you have any additional questions on this matter.
Enclosure:
As Stated ccs w/enclosure:
See next*page c:nce;z({L&de/Z-A. Schwencer, Acting Chief Licensing Branch No. 3 D1vision of Licensing
.. /'
ENCLOSURE
- L The minimum flow *entering the reactor coolant system during and afte_r.
the switchover sha 11 be su*ffi ci ent to remove fi ss fon product decay.
heat assuming any single active failure.
- 2.
The design of the controls and instrumentation shall permit manual operation of the ECC and containment spray systems from the control room at the compone,nt level both prior tO and after the transfer to the recirculation mode has been accomplished.
- 3.
The switchover of th~ ECCS from the injection to the recirculati-0n
. mode of operation shall be automated to the maximum feasible extent, such that. required operator actions *are minimized, atid uninterrupted.
ECCS fl ow is provided to the core.
- 4.
The systems must be able to perforin thefr function despite any sing1e
- postulated instrumentation and control failure, or any postulated single fai.lure of a fluid system.
No single failure shall:
- a.
Prevent automatic transfer to the ~ecirculaiioti mode of opera ti on, or
.b.
Cause inadvertent automatic -transfer to the recirculation mode of operation of both trains of the ECC or the. containment spray systems.
S.
The design of the controls and *instrumentation shall meet IEEE Std. 279-1971.
6 *..
The ESF switchover system shall use seismical,ly qualified components and the switchover shall b~ to a seismically* qu~lified water supply.
- 7. To reduce the probability of the operator prematurely performing manual acti-0ns in the switthover procedure, the procedures shall include ~revisions; for the ~erificatioh of the water storage tank level pripr t~ beginning the manual switchover actions.
cc:* Richard Fryling. Jr., Esq.
- Assistant General Counsel Public Service Electric & Gas Company 80 Park Place
.Newark, New Jersey 07100 Mark Wetterhahn, E~q.*
Conner, Moore & Caber
- Suite 1050 1747 Pennsylv~nia Aventie, N. W.
Washington,.D. c.
20006 Mr. Leif J. Norrholm
- c/o u *. s. Nuclear Regulatory Corrmission Region I, Drawer I
.Hancocks Bridge~ New Jersey 08038