ML19319B950
| ML19319B950 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 01/13/1978 |
| From: | TOLEDO EDISON CO. |
| To: | |
| Shared Package | |
| ML19319B948 | List: |
| References | |
| NUDOCS 8001290686 | |
| Download: ML19319B950 (1) | |
Text
.-.-
. - ~__ _
h i
1, DB-1 t
i SAFETY EVALUATION i
j i
l The proposed change for the Technical Specification Bases identifies the bases for this Technical Specification Change Request.
The purpose of i
the surveillance requirements 4.5.2 g. and 4.5.2. h. is to provide j
assurance that proper ECCS flows will be =aintained in the tvent of a l
loss of coolant accident. Maintenance of proper flow resistance and pressure drop in piping system to each injection point is necessary to:
(1) prevent total pump flow from exceeding runout conditions when the system is in its minimum resistance configuration, (2) assure that the j
design flow through the Decay Heat Removal Cooler is not exceeded and j
(3) provide an acceptable level of total ECCS flow to all injection points equal to or above that assumed in the ECCS-LOCA analyses.
These proposed changes have been developed in response to Mr. John F.
Stol 's letter to Mr. Lowell E. Roe, dated November 9, 1977, concerning throttle valves in ECCS syste=s at the Davis-Besse Nuclear Power Station Unic No. 1.
i sf d/4 1
l i
s b
Sg c2 c) / g_%D
.-