ML20090E163
| ML20090E163 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 12/17/1974 |
| From: | Schneider R NIAGARA MOHAWK POWER CORP. |
| To: | Goller K Office of Nuclear Reactor Regulation |
| References | |
| 12788, AO-50-220-74-15, NUDOCS 8303110602 | |
| Download: ML20090E163 (6) | |
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l NIAGARA MOHAWK POWER CORPORATION l
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300 ERIE t!OULEVARD. WEST SYRACUTE N. Y. M202 Mt(-
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December 17,1974 ^
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r, tit. Karl R. Gotter k i ', ' i
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- n Assistant OLtector of Operating Reactors
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Directorate of Licensing.
l United Stater Atonic Energy Comission Washington, D.C.
20545 l
Dear th. Galler:
i in accordance with the Technical Specifications for the Nine blite Point Nuclear Station, Unit H1, the enetosed l
Abnormat Occtutrance Report (74-15) is being subsitted.
This is in the accepted format as detailed in Regulatory
.s Guide 1.16, Rev. 1.
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l Vert) traly yours, k
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V R.R. Schneider Vice President Electric Operations m
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~ NIAGARA MOHAWK POWER CORPORATIOrd NIAGARA
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SUBJECT:
Abnormal Occurrence 10 Day Letter j'
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REFERENCE:
License DPR 17 Report No.: 50-220
-/74-15' i
Report Dai.c:
12/5/74 Occurrence Date:
11/26/74 I
Facility:
NY NMP #1 Identification of Occurrence:
An operator error resulting in an inadvertent trip of power board #167 Conditions Prior to Occurrence:
X Steady State Power Routine Shutdown
liot Standby Cold Shutdown I.ond Changes Refueling Shutdown i
Routino Startup Other T
s, 1708 Wt 580 We
-Description of the Occurrence:
During a process of Marking up MG Set #167 the operator -
inadvertently tripped the supply breaker for. power board #167..
This power board supplies certain components _of th'e ECCS' system wJth motive valve energy as well:as indicating lights for valve position. This event was. discovered during a weekly
- management review of plant operations and further reviewed during a SORC.
meeting to. determine the significance of this event. The powerboard was de-energized for-15 minutes',
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O Appare.2t Cause of the Occurrence:
Design Procedure Manufacture Unusual Service Condition Installation /Const.
X Operator
-Component Failure Other (Specify)
Analysis of Occurrence:
All redundant components in the ECCS system were in-an operable condition and therefore, no hazard would be presented to the general public.
Corrective Action:
'ihe operator has been warned that procedures and orders must be carefully fo116'ed. This will be followed up in w
training sessions for all oporttors.
l Failure Data:
N/A i
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NIAGARA MOHAWK POWER CORPORATION NIAGARA
-MOHAWK DATE:
December 17, 1974
SUBJECT:
Abnormal Occurrence Report No. 50-220 /74-15 The enclosed Abnormal Occurrence Report is being submitted in accordance with Technical Specifications Section 6.
TO:
James P. O'Reilly Directorate of Regulatory Operations Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406.
l FROM:
Niagara Mohawk Power Corporation Nine Mile Point P.O. Box #32 Lycoming, New" York 13093 Docket 50-220 s
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NIAOAMA MOHAWK DATE:
December 4, 1974
.1 SUBJBCT:
Abnormal Occurrence Report No. 50-_220 /74-15 The enclosed preliminary A0R is being submitted in accordance with Technical Specifications Section 6.
TDr James P. O'Reilly p v s;c Directorate of Regulatory Operations
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Region 1 a,X'.y 631 Park Avenue
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King of Prussia, Pennsylvania 19406 gg)
PROM:
Niagara Mohawk Power Corporation Nine Nils Point - James A. PatsPatrick Site P.O. Box #32 tycoming, New York 13093 Docket 50 220 h*h ey);. 3 ne_=
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NIAGARA MOHAWK POWER CORPORATION
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NIAGARA MOHAWM r
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SUBJECT:
Abnormal Occurrence 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Notification Confirming Mr. C.L. St.uart phone conversstion L
with Mr. T. Shedlosky ABC R0t1 office on 12/4774 I
REFBRENCE:
License DPR 17 T
6 Report No.t 50- 220 /74-15 r
I Report Dater 12/5/ 7_.:
Occurrence Date:
11/26/74 __
Pacility:
Ny FMP W 1 t
Identification of Occurrence:
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On operstor error resulting in an inadvertant trip of a
power board #167 I
Conditions Prior to g
Occurrence:
X Steady State Power Routina Shutdown Hot Standby b
Cold Shutdown Load Changes
'a g.
Refueling Shutdown Routine Startup Other 1700 MWt 500 MWe Description of the Occurrence:
i e
g During a process of " Marking Up" MG Set 5167 the operator g
inadvertently tripped the supply breaker for power board 167, This power board supplies certain components of the ECCS system a[
with motive valvo. energy as well as indicating lights for valve position.
This event was discovered during a weekly managees::t F
ytview of plant operations and further reviewed during a 50RC meeting p
to determine the significance of this event.
The powerboard was E
de-energized for 15 minutes.
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Sppstent Causa cf th3 an:bs Design Procedure Manufacture thi===1 Service Installation /Const.
Condition 1
Operator
- Component Pailure Ottar (3pecify)
Analysis of Occurrence:
All redundant components in the ECCS system were in an operable condition and therefore, no hazard would be presented to the general public.
Corrective Actiont The operator has been warned that procedures and orders must be carefully followed.
This will be followed up in training sessions for all operators.
l Po11ure Data:
N/A e
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