ML20236X348

Provides,Per Cj Paperiello Request,Cost & Value Estimates for Adding Third Diesel Generator to Plant.Comparison of Relative Value & Cost Show That Value of 1.5 Million About One Order of Magnitude Smaller than Estimated Cost

ML20236X348
Person / Time
Site:	Prairie Island, 05000000
Issue date:	12/04/1987
From:	Eng P NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:	Paperiello C NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20195F761	List: ML20235J954 ML20236D162 ML20236D237 ML20236X312 ML20236X348 ML20236X386 ML20236X537 ML20236X577 ML20236X629 ML20236X654 ML20236X673 ML20236X694 ML20236X703 ML20236X732 ML20236X738 ML20236X746 ML20236X939 ML20236X959 ML20236X967 ML20236X988 ML20236X996 ML20236Y022 ML20236Y063 ML20236Y094 ML20244B981 ML20244D524 ML20244D615 ML20244D618 ML20244D726 ML20244D855 ML20244D938 ML20244D943 ML20244E090 ML20244E142 ML20244E158
References
FOIA-87-714, RTR-NUREG-1032, RTR-NUREG-1109, RTR-NUREG-CR-4448, TASK-A-44, TASK-OR NUDOCS 8712090136
Download: ML20236X348 (2)

Text

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i r#/Ed 1.

MEMORANDUM FOR: Cerl J. F aper iell o, Director , Division of Reactor Sefety FROM: Patricia L. Eng, Reactor Inspector , Operational Frograms

SUBJECT:

VALUE IMPACT ASSESSMENT FOR ADDING A THIRD DIESEL GENERATOR AT l PRAIRIE ISL AND NUCLEAR GENERATING STATION References 1. Dr af t NUREG 1109, " Regulatory Analysis f or the Resolution of Unresol ved Saf ety Issue A-44, Station Blackout" Draft NUREG 1032, " Evaluation of Station Blackout Accidents 2.

at Nuclear Power Pl ants" I have perf ormed a rough estimate of the value to be gained i

Per your request, by the addition of a third diesel generetor at the Prairie Island Nuclear l

Generating Plant. In addi tion, data have been acquired regarding the estimated cost for addition,of a third diesel generator. Discussions with Messrs. P. W.

Baranowsky, A. M. Rubin, A. R. Marchese of NRR and Mr. D. Ericson of Sandia Laboratories indicated thet detailed value essessment end cost snelyses are not e vt.i l abl e ; however, the f ollowing may be used to arrive at ball peri figure s for both the value end the cost of the addition of e third diesel generator.

A. Cost of Adding e Third Diesel Gener at or Cost estimetes per f ormed by Sandie f or di esel generotor additions at Cc opc4 sad Duad Cities' etetions heve beer, perf ormed end will be publ i thed i r. NUREG CF- 4445 2n the near future. These costs, in 1955 doi l er s are 14.51 and 11.D mi lli on do11 er s , respectively. The estimatet include the construction of 6 new, seismically qualified t.uil cia ng t c, hous e t he new di esel es weil as l abor , temp or ar s construction, hardware, and modafscetion and eng2neering costs.

Generic costs based on the Energy Economic Data Base mainteined by DOE for eddition of a diesel generator to an existing operating plant ere es t i n.e t e d tc. be appr ox i matel v 1L.3 rill s on do11 ers.

E. Vel ve of Adding a Third Diesel Generator to Frairie Island The velve of adding e new diesel was calculeted by comparing the relats ve cost of a station blackout with a given diesel generator reli ebili ty f act or for Prairie Islend in its current configuration to the relative cost associated with a The station bleckout event with e equation used f or this third diesel generotor instelled.

essessment ist DnCx Px nx t=V where D = person rems per event C = cost per person rem P = event probability per reactor year n = number of reactors per site t = years remaining until end of plant life V = is the estimeted velue of recovery cost f or a given event 8712090136 871204' ,,

PDR FOIA WEISS87-714 PDR es

t

, Ascumptiens anda cros Diesel reliability is assumed to be the industry everage of .225 Preirie Island is assumed to be in thL average offsite power clueter l Station blattout dur etion i s assumed t o be 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> s l

l Values used were 800,000 per son rems per event

$1000 per person rem 2 reactors per site 30 years remaining in plant lifetime Discussions with Mr. Baranowsky revealed that the dif f erence in event probability per reactor year for the current Prairie Island configuration and accident probabilities as compared to the cagy with ,

an additional installed diesel generator varies between 1 x 10 and 3x 10 .

Use of these values places the value of the additional diesel between $480,000 and $1,440,000.

C. Summary Compari son of the relati ve value and cost associated with the eddition of the third diesel r eveal that a value of 1.5 mi ll i or, is eppro::imetely an order of magnitude small er than the estimated. diesel generator costs.

Any questions reverding the celcul ational detail s , probability theory, event Baranowsiy, NRR, (FTS conditions ettetere, shoul d be directed to Mr. F. W.

492-4433).

E111 RIII Rill Eng Phillips Hohl

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