ML19312B910

Proposed Tech Spec 3.11 Deleting Restriction Limiting Unit 1 to 7500 Effective Full Power Hours

ML19312B910
Person / Time
Site:	Oconee
Issue date:	07/30/1974
From:	DUKE POWER CO.
To:
Shared Package
ML19312B906	List: ML19312B905 ML19312B910
References
NUDOCS 7911270702
Download: ML19312B910 (1)

Text

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,- Attachment 2 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 <

r 3.11.1 The first reactor core in Unit 2 may not be operated beyond 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 1

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! 3.11-1

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