05000255/LER-2077-051, License Event Report 1977-051-00 Re Bus Y-01 Load Modification

License Event Report 1977-051-00 Re Bus Y-01 Load Modification

ML18348A209
Person / Time
Site:	Palisades
Issue date:	11/01/1977
From:	Hoffman D Consumers Power Co
To:	James Keppler NRC/RGN-III
References
LER 1977-051-00
Download: ML18348A209 (2)

LER-2077-051, License Event Report 1977-051-00 Re Bus Y-01 Load Modification

Event date:
Report date:
2552077051R00 - NRC Website

text

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consumers Power company General Offices: 212 West Michigan Avenue, Jackson, Michigan 49201

• Area Code 517 788-0550 November 1, 1977 Mr James G Keppler Office of Inspection and Enforcement Region III US Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 DOCKET 50-255 - LICENSE DPR PALISADES PLANT - ER-77 BUS Y-01 LOAD MODIFICATION Attached is a reportable occurrence for the Palisades Plant involving tne addition of a new load to Bus Y-01.

The event was not classified as report-able until October 24, 1977.

David P Hoffman Assistant Nuclear Licensing Administrator CC:

ASchwencer, USNRC Nov 3 1977

LICENSEE EVENT REPORT Palisades CONTROL BLOCK: I I I I I I 1..._......... __..__.,__...__.___,6 [PLEABE PRINT ALL IREGUliRED 11\\lFORMAYUONJ LICENSEE NAME

@12] IMI rlPIAIL 11 I 7

8 9 14

@I!]caN~ I* I *I 7 8 57 58 REPORT TYPE.

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59

EVENT DESCRIPTION

LICENSE LICENSE NUMBER TYPE Io Io 1-1 o I ol o lo lo 1-1 o Io I 1411!1!1!11 15 25 26 30 REPORT SOURCE LlJ 60 OOCKET NUMBER lo l5 IOl-lol215 l51 EVENT OATE IOl9l21717171

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68 69 74 EVENT TYPE Io I 3 I 31 32 REPORT DATE 1111101117171 75 80 lol2I I Following a loss of site power resUlting in loss of security door operation, the se-j 80 to Bus Y-01/EDG without all required admin conj 7

~ 9 lol31 I curity door power source was shifted 7

8 9 80 lol41 I trols.

7 8 9 The added load was less than 1 percent of EDG capacity; loss of redundancy I 80 lol5l I not threatened.

Event nonrepetitive.

Reportable per Technical Specification I

7 8 9 loisl I 6.9.2.b.3 and not classified as a reportable occurrence until Oct 24, 80 1977.

I 7

8 9 SYSTEM CODE

@0 I EIB I

CAUSE

CODE COMPONENT CODE W

lzlzlzlzlzlzJ 7

8 9 10 11 12 17 CAUSE DESCRIPTION PRIME COMPONENT SUPPLIER UJ 43 COMPONENT MANUFACTURER I z I 9 I 9 I 9 I 44 47 (LER 77-5l'J30 VIOLATION l!.J 48 Iola! I The load was added prior to receipt of a load st.udy, due to misinterpretation of I

7 8 9

~ I instructions to complete the modifications left over from 1976.

80 Upon discovery of I

-.7 89 12@1 I the lo~d addition, load estimates were made and deemed acceptable.

7 8 9 80 The load ( contd)j 80 EE]

7 8

rn 7

8 METHOD OF FACILITY STATUS

% POWER OTHER STATUS DISCOVERY l_gJ I 0 I 0 I 0 I l.._ __

_.;.N/_A_~I w 9

10 12 13 44 45 FORM OF ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY lzJ W

l....._ __

--'N""""/-=A __

____.I 9

10 11 44 45 PERSONNEL EXPOSURES NUMBER TYPE

DESCRIPTION

~I olol ol W N/A 7

8 9 11 12 13 PERSONNEL INJURIES NUMBER

DESCRIPTION

DISCOVERY DESCRIPTION I Post Outage Review 46 LOCATION OF RELEASE N/A 80 80 80

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10101 OI

~N_/_A _______________________

___J 7

8 9 11 12 80 PROBABLE CONSEQUENCES

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N/A 7

8 9 80 LOSS OR DAMAGE TO FACILITY TYPE

DESCRIPTION

[fil I zl

~~N~/=A~~~~~~~~~~~~~~~~~~~~~~~~~~~__J 7

8 9 10 80 PUBLICITY lill)

N/A 7

8 9 ADDITIONAL FACTORS

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I Cause Description Contd.

~9 ITJfil I to be acceptable.

7 89 80 study completed on October 19, 1977 showed the loading. I 80 I

80