ML18030A009

Requests Submittal of ATWS Emergency Operating Procedure. NRC Review May Include Visit to Facility to Determine Feasibility of Implementing Proposed Procedures Through Operator Simulation

ML18030A009
Person / Time
Site:	Susquehanna
Issue date:	08/15/1980
From:	Tedesco R Office of Nuclear Reactor Regulation
To:	Curtis N PENNSYLVANIA POWER & LIGHT CO.
References
NUDOCS 8008270200
Download: ML18030A009 (5)

Text

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Mr. Norman H. Curtis, Vice Presf RMStark NSIC Engineering and Construction Pennsylvania Power and Light Company 2 North Nfnth Street J

Allentown, Pennsyl vanf a 18101 JMil1er

Dear Mr. Curtis:

RVollmer DRoss

SUBJECT:

INTERIM ACTIONS NEEDED FOR PLANT OPERATIOH PENDING FINAL RESOLUTION OF ANTICIPATED TRANSIENT LtITH FAILURE TO SCRAN (ASS)

(GENERAL ELECTRIC Bi)

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Docket Hos.:

50-387 and,'0=36/

'owever, in addition to our licensing requirement for a recirculation pump trip to mitigate the short-term consequences of ATHS events, the staff believes the following steps should be taken as a prudent course prior to the.issuance of an operating license in order to further reduce the rfsk from ATHS events during the interim period before the required plant modifications as determined by the Commission are completed.

In December 1978, the Nuclear Regulatory Commission (NRC) staff issued Volume 3 of WUREG-0460 which describes the proposed type of plant modifications the staff believes are necessary to reduce the risk from anticipated transients with failure to scram (ATNS) to an acceptable level.

The HRC's Pegulatory Requirements Review Coaefttee completed its review fn January

1979, and concurred with the staff's approach described fn Volume 3 of NUREG-0460 insofar as it applies to your plant.

The staff has issued requests for the fndustry to supply generic analyses to confirm the ASS mitfgation capacility described in Volume 3 of HUREG-0460.

Subsequently, the staff'lans to present fts reconmndatfons for rulemakfng on ATHS to the Conmfssion.

The Commission would, by rulemakfng, determine the requfred modifications to resolve ATMS concerns and the required schedule for the fmplementation of such modfffcatfons.

Your plant would of

course, be sub)ect to the Commission's decision fn this matter.

i Based on considerations described in pages 42 through 45., Volume 3 of NUREG-0460, the staff generally concluded that plants with operating licenses can continue to operate Without undue risk to %he health and safety of the public during the estimated 2 to 5 year period needed to implement the necessary modifications.

OFFICE P SURNAME DATE).

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NRC FORM 318 (9-76) NRCM 0240 AV.S. GOVERNMENT PRINTING OFFICE: 1979 289 369

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Hr. Norman I/t. Curtis An emergency operating procedure should be developed for an ATMS event, including consideratio'n of scram indicators, rod position indicators, average power range flux monitors, (APRN}, reactor vessel level and pressure indicators, relief valve and isolation valve indicators, and containment temperature, pressure and radiation indicators.

The emergency operating procedure should be sufffcfently simple and unambiguous to permit prompt operator recognftfon of an -ATHS event.

The emergency operating procedure should describe actions to be taken fn the event of an ATHS including consideration of manually scramming the reactor by Using the manua'l scram buttons followed by changing the operation mode s<<itch to the shutdown posftion, stripping the feeder breakers on the reactor protection'ystem power distribution buses, scrawafng individual control rods from the back of the control room panel, tripping breakers from plant auxiliary power source feeding the reactor protection system, and valvfng out and bleeding off instrument air to scram solenoid valves.

These actions must be taken fmmedfately after detection of an ANS event.

Actions should also include prompt fnftfatfon of the residual heat removal system fn the suppression pool cooling mode to reduce the severity of the containment conditions; and actuation of the standby liquid control system ff a scram cannot be made to occur.

Early operator action as described above, in con3unction fifth a recirculation pump trip, would provide sfgnfffcant protection for some ATWS events, namely those <<hich occur (1) as a result of common mode failure fn the electrfca'I portion of the scram system and some portfons of the drive system, and (2} at Iow po<<er levels.. @here the exfstfng standby liquid control system 'capability is sufffcfent to limit the pool temperature rise to an acceptable level.

Me require that you submit your ATRS emergency operating procedure Our revfe<< may include a visit to your plant to determine the feasibility of fmplementfng.gggr~

proposed procedures through operator simulation of the steps.

Our evaluation must conclude that an acceptable procedure and operator training are completed prior to the issuance of a fu'll power operating 'license.

Sincerely, OAlGltlALSlGNED BY O.%~4 ~m~~~ i~~

Robert L. Tedesco, Assistant Dfrector for Licensing Division of Licensing cc:

See next page QFFICES <<LBjB sURNAME

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/.../89 NRC FORM 318 (9.76) NRCM 0240 4 U.S. GOVERNMENT PRINTING OFFICE: 1979 289'369

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Hr. Norman W. Curtis Yice President

- Engineering and Construction Penn.yIvania Power and Light Company 2 North Ninth Street Al 1 entown, Pennsyl vani a 18101 CC Hr. Earle M. Mead Project Engineering Manager Pennsylvania Power 8 Light Company 2 North Ninth Street Al 1 entown, Pennsyl vani a 18101 Jay Silberg, Esq.

Shaw, Pittman, Potts Trowbridge 1800 M Street, N.

W.

Washington, D. C.

20036 Hr. William E. Barberich, Nuclear Licensing Group Supervisor Pen.;;ylvania Power

& Light Company 2 N-rth Ninth Street All~ntow, Pennsyl vania 18101 Edward H. Nagel, Esquire General Counsel and Secretary Pennsylvania Power

& Light Company 2 North Ni nth St rect Al 1 entown, Pennsyl vani a 18101 Bryan Snapp, Esq.

Pennsylvania Power

& Light Company 2 North Ninth Street Al 1 entown, Pennsyl vania 18101 Robert M. Gallo Resident Inspector P. 0.

Box 52 Shic'".shinny, Pennsyl vani a 18655 Susquehanna Environmental Advocates c/o Gerald Schultz, Esq.

500 South River Street

'~ Wi1kes-Barr e, PA 18702 John L. Anderson Oak Ridge Na'ional Laboratory

.nion CarbIde Corporation B! dg. 3500, P. 0.

Box X Oar. Ridge,

.;.nnessee 37830 Nr.

E, O'. Poser Project Engineer Bechtel Power -Corporation P. 0.

Box 3965 San Francisco, California 94119 Matias F. Travieso-Diaz, Esq.

Shaw, Pittman, Potts 8

Trowbridge 1800 M Street, N.

W.

Washington,

0. C.

20036 Dr. Judith H. Johnsrud Co-Director Environmental Coalition on Nuclear Power 433 Orlando Avenue State College, PA 16801 Mr. Thomas M. Gerusky, Director Bureau of Radiation Protection Department of Environmental Resources Commonwealth of Pennsylvania P. 0.

Box 20'63 Harrisburg, PA 1?120 Ms. Colleen Harsh Box 538A, RD¹4 Mountain Top, PA 18707 Mrs. Irene Lemanowicz, Chairperson The Citizens Against Nuclear Dangers P. 0.

Box 377 RD¹1

Berwick, PA 18503 Mr. J.

M. Millard Project Manager Mail Code 394 General Electric Company 175 Curtner Avenue San Jose, California 95125