ML20024C594

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Forwards Suppls 1 & 2 to Evaluation of Transient Behavior & Small RCS Breaks in 177 Fuel Assembly Plant, Vol 1, Section 6.0
ML20024C594
Person / Time
Site: Three Mile Island Constellation icon.png
Issue date: 05/12/1979
From: Taylor J
BABCOCK & WILCOX CO.
To: Mattson R
NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES)
Shared Package
ML20024C595 List:
References
TASK-07, TASK-7, TASK-GB GPU-2214, NUDOCS 8307120853
Download: ML20024C594 (2)


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) , g fp P.O. Box 1250 '.yr.c..m;rg, va. 2:5a5 Telechone:($34) 334 5:11 1

/M 7 May 12, 1979 1

Dr. R. J. Mattson, Director , j Division of Systa= Safety

  • office of Nuclear Reactor Regulation .

U.S. Nuclear Regulatory Co==ission Washi=ston, D.C. 20555 i

Refe:ence: "Ivaluation of Transie=t 3eha'vior and Sna11 Reactor Coolant Systen Breaks in the 177 Tual Assecbly Plant " May 7, 1979.

Dear Dr. Mattson:

The Stafi's review of the reference has'resulted in an NRC requast for additions.1 info:=ation on Section 6, "S all Break Analyses." Specifi-cally, the Staff requested the following analyses:

, "S=a11' Break f~n the Pressurizer (PORV) With No Anvd m 7

- Feedvater and One EPI Pt p" l ..

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l 3&W has perfo =ed the requested analysis and concluded that the system is r.aintained in a safe conditien with the core re=aini=g covered out to at least 30 inutes. This calculation involves the conservative in-put asst prion of 1.2 x R:S decay heat. The results of the n miysis are attached to this letter and have been identified as Supple =ent 1 to

.Section 6 of the reference.

We also have ce=;1eted a s' 'lar calculation using 1.0 x M S decay heat.

'"his ennlysis was carried out to a;;;cr -*ttly d 4700 seconds where the pressure turned around. The core remains covered throughout the tran-sient. The results of the analysis are attached to this letter and are designated as Supple =ent 2 to Section 6 of the reference.

If you have any additional questions, please call me at (804) 384-5111 .

Ixt. 2817 (office) or ,(804) 3S4-3457 (home).

. Y truly yours,

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J. E. Ta o":, Manager j ,

Licensing i

JET /1t'

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/ cc: I.A. Womack C.C. Schieck *

  • E.R. Kane C.O. Caissle R.E. Ea= 3.M. Du=n R.E. Davis

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