05000260/LER-1981-007-03, /03L-0:on 810129,during Power Increases,Tech Spec Limit of 13.33 Kw/Ft for Linear Heat Generation Rate Exceeded in One Node.Node Reached 13.77 Kw/Ft.Caused by Xenon Transient Resulting from Increased Core Power

/03L-0:on 810129,during Power Increases,Tech Spec Limit of 13.33 Kw/Ft for Linear Heat Generation Rate Exceeded in One Node.Node Reached 13.77 Kw/Ft.Caused by Xenon Transient Resulting from Increased Core Power

ML19351F902
Person / Time
Site:	Browns Ferry
Issue date:	02/13/1981
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19351F900	List: 05000260/LER-1981-007, Forwards LER 81-007/03L-0 05000260/LER-1981-007-03, /03L-0:on 810129,during Power Increases,Tech Spec Limit of 13.33 Kw/Ft for Linear Heat Generation Rate Exceeded in One Node.Node Reached 13.77 Kw/Ft.Caused by Xenon Transient Resulting from Increased Core Power
References
LER-81-007-03L-01, LER-81-7-3L-1, NUDOCS 8102200457
Download: ML19351F902 (1)

LER-1981-007, /03L-0:on 810129,during Power Increases,Tech Spec Limit of 13.33 Kw/Ft for Linear Heat Generation Rate Exceeded in One Node.Node Reached 13.77 Kw/Ft.Caused by Xenon Transient Resulting from Increased Core Power

Event date:
Report date:
2601981007R03 - NRC Website

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f. FORM 366 U. S. NUCLEAR REGULATORY COMMISSION

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60 el OOCKET NUMSER 68 69 EVENT DATE 74 75 REPCRT DATE 80 EVENT DESCRIPTION AND PRC8 ABLE CONSECUENCES h 13l2; l During power increases, the technical specification limit of 13.33 Kw/ft l

go,3, l for linear heat generation rate was exceeded in one node. (T.S.3.5.J).

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io,4, I node reached 13.77 Kw/ft. Previous events: 50-259/8053, 50-259/8056, and 50-259/8078).

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1. 'I enhes::ee " alley Authority Form BF-17 3 rowns Ferry Nuclear Plant BF 15.2 1/10/79 LER SUPPLEMENTAL INFORMATION 3 FRO 260 / 8107 Technical Specification involved 3.5.J Repcried Under Technical Specification 6.7.2.b.2 Date f Occurrence 1/29/81 Time of Occurrence 0915 Unit 2

Iilent Qention and Description'of Occurrence:

The technical specification limit of 13.33 Kw/ft for LHGR was exceeded for one node. The nods reached 13.77 Kw/ft.

Conf piens Prior to Occurrence:

th1t 1 at 1082 We.

Lbit 2 at 1100 We.

Unit 3 at 960 We.

Acti n specified in the Technical Specification Surveillance Requirements met due tLinocerable equipment. Describe.

NA Aps:2:lt Cause of Occurrence:

A rapid xenon transient caused by power increase.

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Anaiv iis of Occurrence:

There was no damage to plant equilment. There was no activity release, no personnel exposure or injury and uo danger to the health or safety of the public.

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Car: etive Action:

Load was decreased by 25 Ne with recirculation control.

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Failure Data:

50-259/8053, 50-259/8056 and 50-259/8078.

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"P.< t en tien :

Period - Lifetime; Responsibility - Administrative Supervisor "R evisian :

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