ML18348A209

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)

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

@12] IMI rlPIAIL 11 I Io Io 1-1 o I ol o lo lo 1-1 o Io I 1411!1!1!11 Io I3 I 7 8 9 14 15 25 26 30 31 32 REPORT REPORT TYPE. SOURCE OOCKET NUMBER EVENT OATE REPORT DATE

@I!]caN~ I* I *I ~ LlJ lo l5 IOl-lol215 l51 IOl9l21717171 1111101117171 7 8 57 58 59 60 ~ 68 69 74 75 80 EVENT DESCRIPTION lol2I I Following a loss of site power resUlting in loss of security door operation, the se-j 7 ~ 9 80 lol31 I curity door power source was shifted to Bus Y-01/EDG without all required admin conj 7 8 9 80 lol41 I trols . The added load was less than 1 percent of EDG capacity; loss of redundancy I 7 8 9 80 lol5l I not threatened. Event nonrepetitive. Reportable per Technical Specification I 7 8 9 80 loisl I 6.9.2.b.3 and not classified as a reportable occurrence until Oct 24, 1977. I 7 8 9 PRIME (LER 77-5l'J30 SYSTEM CAUSE COMPONENT COMPONENT CODE CODE COMPONENT CODE SUPPLIER MANUFACTURER VIOLATION

@0 I EIB I W lzlzlzlzlzlzJ UJ Iz I 9 I 9 I 9 I 47 l!.J 7 8 9 10 11 12 17 43 44 48 CAUSE DESCRIPTION Iola! I The load was added prior to receipt of a load st.udy, due to misinterpretation of I 7 8 9 80

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

-.7 80 12@189I the lo~d addition, load estimates were made and deemed acceptable. The load ( contd)j 7 8 9 80 FACILITY METHOD OF EE]

7 8 STATUS l_gJ 9 10

% POWER 12 13 OTHER STATUS I 0 I 0 I 0 I l..__ __.;.N/_A_~I 44 w

DISCOVERY 45 DISCOVERY DESCRIPTION I Post Outage Review 46 80 FORM OF ACTIVITY CONTENT 7

rn 8 RELEASED lzJ 9

OF RELEASE 10 11 AMOUNT OF ACTIVITY W l.....___--'N""""/-=A_ _____.I 44 45 LOCATION OF RELEASE N/A 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION

~I olol ol W N/A 7 8 9 11 12 13 80 PERSONNEL INJURIES NUMBER DESCRIPTION

~ 10101 OI ~N_/_A_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ____J 7 8 9 11 12 80 PROBABLE CONSEQUENCES

~ N/A 7 8 9 80 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION 7

[fil8 9I zl 10~~N~/=A~~~~~~~~~~~~~~~~~~~~~~~~~~~__J 80 PUBLICITY lill) N/A 7 8 9 80 ADDITIONAL FACTORS

~ I Cause Description Contd. study completed on October 19, 1977 showed the loading. I

~9 80 ITJfil I to be acceptable. I 7 89 80