ML20151V679

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Forwards Insp Rept 50-213/88-03 on 880301-0404.No Violations Noted.Util Discovery of Error in ECCS Flow Delivery Curves Will Allow More Accurate Modeling of Plant Response to Postulated Accident Conditions
ML20151V679
Person / Time
Site: Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png
Issue date: 04/21/1988
From: Bettenhausen L
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To: Mroczka E
CONNECTICUT YANKEE ATOMIC POWER CO.
Shared Package
ML20151V682 List:
References
NUDOCS 8805030143
Download: ML20151V679 (2)


See also: IR 05000213/1988003

Text

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Docket / License: 50-213/DPR-61

Connecticut Yankee Atomic Power Company

ATTN: Mr. E.'J. Mroczka

Senior.Vice Fresident - Nuclear

Engineering and Operations

P. O. Box 270

Hartford, Connecticut 06141-0270

Gentlemen:

Subject: Resident Inspection 50-213/88-03 (3/1/88 - 4/4/88)

This transmits the findings of the above subject NRC inspection of the Haddam Neck

Plant by Mr. J. T. Shediosky and Ms. A. A. Asars. No. violations were identified

no reply to this letter is required. The inspection findings have been discussed

with Mr. D. B. Miller of your staff.

During this inspection period,. your- staff detected an error in the Emergency Core

Cooling. System flow delivery curves, which have been used in the Large Break Loss

of Coolant Accident analysis since 1971. Discovery of this error will allow more

accurate modeling of plant response to postulated accident conditions. Also, we

noted that your thorough approach to upgrade the plant safety analysis productively

-questioned the older . accepted calculations which led to detection of this error.

Your cooperation with us is appreciated.

Sincerely,

OrJgla33 Signed By:

Lee;f. Bettenhennes

Lee H. Bettenhausen, Chief

Projects Branch No. 1

Division of Reactor Projects

Enclosure: NRC Region I Report 50-213/88-03

cc w/ enc 1:

W. D. Romberg, Vice President, Nuclear Operations

D. B. Miller, Station Superintendent

D. O. Nordquist, Director of Quality Services

R. M. Kacich,-Manager, Generation Facilities Licensing

Gerald Garfield, Esquire

Public Document Room (POR)

local Public Document Room (LPDR)

Nuclear Safety Information Center (NSIC)

NRC Resident Inspector

State of Connecticut

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