ML19312B910
| ML19312B910 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 07/30/1974 |
| From: | DUKE POWER CO. |
| To: | |
| Shared Package | |
| ML19312B906 | List: |
| References | |
| NUDOCS 7911270702 | |
| Download: ML19312B910 (1) | |
Text
- _
3.11 MAXIMUM POWER RESTRICTION Applicability a
l Applies to the nuclear steam supply system of Units 2 and 3 reactors.
Objective 4
To maintain core li'a margin in reserve until the system has performed under operating '.onditions and design cojectives for a significant period of time, t
Specification 3.11.1 The first reactor core in Unit 2 may not be operated beyond r
11,040 effective full power hours until supporting analysis and data pertinent to fuel clad collapse under fuel densifi-cation conditions have been approved by the Directorate of Licensing.
3.11.2 The first reactor core in Unit 3 may not be operated beyond 10,944 effective full power hours until supporting analysis and data pertinent to fuel clad collapse under fuel densifi-
{
cation conditions have been approved by the Directorate of Licensing.
Bases
)
The licensing staf f has reviewed the effects of fuel densification for the j
first core in Oconee Units 2 and 3 and concluded that clad collapse will not j
take place within the first fuel cycle (11,040 effective full power hours j
for Unit 3 and 10,944 effective full power hours for Unit 3).
- However, the clad collapse model used is questionable for extrapolation of clad collapse time out beyond the first fuel cycle because of limited experi-mental verification.
J l
t I
7niava 7@
l 3.11-1
.