ML19326E052

Special Rept 80-02:on 800706,moderator Temp Coefficient Measured Less Positive than Limit Established in Tech Specs During Low Power Physics Testing.Control Rod Withdrawal Limit Determined as Shown in Encl Graph

ML19326E052
Person / Time
Site:	Sequoyah
Issue date:	07/15/1980
From:	TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML19326E026	List: ML19326E025 ML19326E052
References
NUDOCS 8007250499
Download: ML19326E052 (2)

Text

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SPECIAL REPORT 80-2 MODERATOR TEMPERATURE COEFFICIENT The al)-control rods out, beginning of life, moderator temperature coeffi-cient (!!TC) was determined on July 6,1980 to be 0.85 x 10-5 delta k/k/0F.

This does not meet the criteria of less positive than 0 delta k/k/cy established in the Sequoyah Nuclear Plant Unit 1 Technical Specifications.

Control red withdrawd limits (See attached) have been determined. A conservatism of 1 x 10-5 delta k/k/ F has been included in the limits to ensure that the reactor is not operated with a positive MTC. The predicted burnup at which the MTC will be restored to within its limit is 1000 MWD /

FEU.

This report is submitted in accordance with Technical Specification 6.9.2 and 3.1.1.3 Action a.

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