ML18094A029

LER 1978-001-00 for Nine Mile Point Station Unit 1 Re Delta Temperature of Discharge Water Exceeded Specification 2.1.5 of Environmental Tech Specs

ML18094A029
Person / Time
Site:	Nine Mile Point
Issue date:	01/13/1978
From:	Niagara Mohawk Power Corp
To:	NRC Region 1
References
LER 1978-001
Download: ML18094A029 (1)

Text

NRC FORM 3GG U. S. NUCLEAR REGULATOIIYCOIVIMISSION (7.77)

LICENSEE EVENT REPORT

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~'sONTROL BLOCK: (PI.EASE PRINT OR TYPE ALL REQUIRED INFORMATION)

I 6 CO' 8 9 7 N N LICENSEE CODE P 1 14 Q20 15 0 - 0 0 0 LICENSE NUMBER 0 0 -

25 Q34 26 I 1 LICENSE TYPE 1 IQ4~Qs 30 57 CAT 58 CON'T

~LQ8 0 5 0 0 0 2 2 0 QP 0 1 0 4 7 8 Qs0 1 1 3 7 8 Qs 8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE EVENT OESCRIPTION AND PROBABLE CONSEQUENCES Q10

~o2 During reverse flow operations, delta temperature of the discharge

~D3 water exceeded speci fi cati on 2. 1 .5 of the Envi ronmental Techni cal Specifications. The allowed 50 degrees F.delta temperature was exceeded by values of 0.5 to 246 degrees F during the period two

~DG through six hours after reversal. This condition resulted in minimal

~o 7 safety implications.

~08 7 8 9 SYSTEM CODE CAUSE CODE CAUSE'OVIP SUBCODE CO1VIPONENT CODE SUBCODE VAI.VE SUBCODE

~HF Qll 5 Q12 ~X Qs 13 X X X X X X 18 Q4,~ZQ15 19 Z

20 Qls 7 8 9 10 11 12 SEOUENTIAL OCCURRENCE REPORT REVISION Q17 LERIRO osP082 ACTION, FUTURE EVENT YEAR

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21 22 EFFECT

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23 SHUTDOWN

~00 24 REPORT NO.

I 26

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27

~04 28 ATTACHMFNT CODE 29 NPBD.4 TYPE

~T 30 PRIME COMP.

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31 NO.

32 0

COMPONENT TAKEN ACTION ON PLANT METHOD HOURS +22 SUBMITTED FORM SUB. SUPPLIER MANUFACTURER

~ZQ18 ~X QIS ~ZQ2o ~ZQ21 0 0 0 0 ~Y Q23 ~N08 ~Z Q25 X 9 9 9 Q28 33 34 35 36 37 40 41 42 43 44 47 CAUSE OESCRIPTION AND CORRECTIVE ACTIONS Q27 Gate C the circulatin water dischar e ate to the dischar e tunnel f iled to close corn letel . This ermitted warm dischar e water to mix with the inlet water raisin the tern erature of'he inlet water.

3 Gate C will be investi ated durin the next refuel in outa e to 7 8 9 determine wh it han s u 80 FACILITY STATUS 55 POWER OTHER STATUS Q METHOD OF DISCOVERY DISCOVERY DESCRIPTION Q32 Reverse Flow Operations 5 Qss LOOSSJQ28 LAJQ>>

7 8 9 10 12 13 44 45 46 80 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITYQ35 LOCATION OF RELEASE QG NA NA 7, G 8

~Z 9

Q>> ~ZQ34 10 PERSONNEL EXPOSURES 44 45 80 NUMBER TYPE DESCRIPTION Q39

~00 0 Q31 Z Q38 NA 4 80 7 8 9 11 12 13 PERSONNEL INJURIES NUMBER OESCBIPTIONQ 8 ~00 0 Q4o NA 80 7 8 9 11 12 LOSS OF OR DAMAGE TO FACIL'ITY TYPE DESCRIPTION Q43 9 Z Q42 NA 8 9 10 80 PUBLICITY ISSUED DESCRIPTION Q NRC USE ONI.Y

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'HONE:

48 LNJQ44 NA 2 8 9 I0 68 '69 80 NAME oF PREPARER D. K. NacVi tt