ML19322C594
| ML19322C594 | |
| Person / Time | |
|---|---|
| Site: | Crane, Davis Besse  |
| Issue date: | 12/04/1978 |
| From: | Domeck C TOLEDO EDISON CO. |
| To: | Lazar A BABCOCK & WILCOX CO. |
| References | |
| TASK-TF, TASK-TMR NUDOCS 8001170918 | |
| Download: ML19322C594 (2) | |
Text
.. _.
ATTACli.'5..i! 3.
P T. Tc E o r
b Ub.N05{b TELECOPIED Dece=ber 4, 1978 File:
0274, M-506, M-507, M-538 Babcock & Wilcox Company TBW 5 03: ~
P. O. Box 1260 15 Lynchburg, Virginia 24505 Attention:
Mr. A. H. Lazar Senior Proj,ect Manager
Subject:
Davis-Besse Nuclear Power Station Unit 1 Dual Level Setpoints on Steam Generators For Auxiliary Feedwater System
Dear A1:
At the meeting on this subject in your office on November 27, 1978, it was decided that',further'. analysis is required to support the safety evaluation of the proposed
- dual level control setpoints on the steam generators.
Please provide analysis and required stea generator levels for the following conditions:
1)
Loss of =ain feedwater flow with reactor coolant pumps running and the reactor at 15% power.
~
2)
Loss of offsite poyer incident and the effects on the pressuriter level at various power levels.
3)
Nor=al reactor trip at low power.
s
- 4),;Small breaks requiring high pressure injection pump operation with one reactor. coolant pump operating _ or with one or two reactor coolant pu=ps per loop operating.
5)
Rechecking of small break analysis (3AW-10,075A, Rev. 1),
considering interim operation and ulti= ate operation after the
$ dual.setpoint change has been installed.
TECO P3CJECT BaW t:?r.O Nr2 :. -- -
GEC 8 ES SotA t
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THE TCLECO EC'SCN COMPANY ED! SON PLAZA 3C0 MADtSCN AVENUE
'TOLECD, OHr0 23S52
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6)
Your evaluation as to whether or not reactor coolant pu=p running status should be included in the dual setpoint control logic.
7)
Other analyses that B&W may find are necessary as a result of '
the above.
Please provide a schedule for these analyses and further definition of t.the extent of the analysis. *We have been asked by NRR NRC, to provide.
lthem.vich a written report to supporE continued. operation.(vich operator action) and operation after the dual level setpoint' change has been installed.
e Yours very truly, 0
AA*
e Charles R. Do=eck
~
Nuclear Project Engineer Power Engineering & Construction CRD:FRM db a/12-13 Cc:
E. C. Novak J. D. Lenardson R. E. Blanchong T. D. Murray C. T. Daft M. Malcom I
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