ML19257B594
| ML19257B594 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 11/13/1978 |
| From: | Nirodh Shah BABCOCK & WILCOX CO. |
| To: | Swanson E NRC OFFICE OF THE EXECUTIVE LEGAL DIRECTOR (OELD) |
| References | |
| TASK-TF, TASK-TMR NUDOCS 8001170692 | |
| Download: ML19257B594 (1) | |
Text
p THE SABC00K & WILC0X COMPANY POWER GE"ER1 TION GROUP To l
E.W.
Swanson, Integration From E U.H. Shah,_ ECCS Analysis (2136) 805 663 3 Cust.
File No.
TECO-1 NSS-14/T3.4 Subj.
Date Auxiliary Feedwater Level Control (November.13, 1978-ltu.......................,..........ir.
A question is asked whether a lov SG 1evel set point for the TECO-1 plant vould be adequate.
The ECCS Unit has reviewed the inpact of low level on LOCA analysis.
The auxiliary feedwater level control is significant for small breaks
.only. 'The analysis for the presently. approved small break topical report BAW-10075A, Rev. 1, was based on a 32 ft AFW 1evel.
Subsequent: scoping
- studies donc, but1not reported to NRC, have shown that a 10-ft AFW 1evel control is adequate.to assure core safety for a s=all leak transient.
However, a level set less than 10-ft would require additional cocputer analyses and possible model and/or hardware changes needing N2C approval.
NHS/lc ec:
3.M. Dunn R.C. Jones G.E. Anderson B.A. Karrasch R.C. Luken W.H. Spangler E.A. Wo=ack 19\\6~\\l4 8001170f g