ML18283B486
| ML18283B486 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 07/16/1976 |
| From: | Fox H Tennessee Valley Authority |
| To: | Moseley N NRC/IE, NRC/RGN-II |
| References | |
| BFRO-50-296/761W | |
| Download: ML18283B486 (7) | |
Text
NRC FoRM 195 I2. 76 I U.S. NUCLEAR REGULATORY C ISSION NRC DISTRIBUTION FOR ipse,RT 50 DOCKET MATERIAL DOCKET NUMBER 50-296 FILE NUMBER INCIDENT REPORT TO:
Mr, Norman C, Moseley FROM:
Tennessee VaIley Authority
.Chattanooga, Tennessee H
S Fox DATE OF DOCUMENT 7/16/76 DATE RECEIVED 7/20/76 ETTER OORIGINAL op/
DESCRIPTION 0NOTOR IZED
(/UNCLASSIFIED PROP INPUT FORM ENCLOSURE NUMBER OF COPIES RECEIVED one signgd copy I
Ltr. trans the following:
- '" 'PLANT NAME:
Browns Ferry Unit 3 Licensee Event RePort (RQ 50-296/761@)
'on 7/4/76 concerning the'.blade 'guide ass'embly handle which was broken during fuel loading operations, ACRO
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NOTE:
lF PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J..COLLINS BRANCH CHIEF:
U CYS FiOR ACTION LIC..'ASST.:
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/CYS ACRS CYS HOLDING S S tolz H lton FOR ACTION/INFORIiIIATION 7 2176 RJL INTERNALD ISTRl BUTION I%E 2
MIPC SCHROEDER IPPOLITO HOUSTON NOVAK CHECK GRIMES CASE TEDESCO MACCARY EISENHUT SHAO VOLLEYER EJNCH KREGER J. COLLINS LPDR:Athens Ala.
TIC:
EXTERNALDISTRIBUTION 0 TROL NUMBER 7go NRC FORM 196 I2.76)
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JUL 16 1976 NNESSEE VALLEYAUTH TY CHATTANOOGA. TENNESSEE 3740$
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Mr. Norman C. Moseley,'irector U.S. Nuclear Rezm3.atory Com&ssion Office of Inspection and ~orcement Re+on II 230 Peachtree
- Street, kid., 8th FLoor Atlanta, Gcor~a
.30303
Dear Mr. Moseley:
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'~Regulator.:Do'cl et File TKtNESSEE VAIZEYAUT1iORITY 3H(XQ'fS FERRY NUCLEAR PLViT Ui'lIT 3-DOCIKT HO.50-29o - FACILITY OPZiWZXhYi LECEiiTSE DPRAG - REPORTABLE OCCURREhCE REPORT BZRO 50-296/761M The enclosed rePort is to orovide details concerning a olade guide assembly that
>~as bein removed fxom the reactor as varC ox fuel-loading one ations and is sub-~tted in accordance
~lith Aoyerdix E to Remxlatory Guide 1.'6, Revision 4, Atilt 1975.
Kris event occurxed on Brans Ferry Nuclear Plant unit 3.
=Very truly you s, TJMMSEE VAIZZYAUTHORITY H. S. lox Dixector of Po~ler Production Enclosure (3)
CC (Enclosure):
Director (3)
Office of Management Information and U.S. 1'nuclear Rectory Colrmission Mashington, D.C.
20555 Director (40)
Office of InsPection and.
xforcement U.S. Nuclear Regulatory Comad.ssion Haalu.ngton, D.C.
20555 8'
P"'rogram
- Control, 8308 An Equal Opportunity Employer
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- ICENSEE EVENT REPORT CONTROL BLOCK:
~t 1
UCENSEE NAME
[OD1]
A L
B R 'iF 3
7 89 14 15 LCENSE NUMBER 0
0 0 0
0 0
REPORT REPORT'ATEGORY TYPE SOURCE'OCKET NUMBER IOD1] CON'7 ~+
2 L
0 5
0 0 2
7 8
57 58 59 60 61 t'PLEASE PAINT ALLREQUIRED IIIIFORIVIATION)
UCENSE EVENT TYPE TYPE 0 0 0
4 1
1 1
1 L0oc1iI 25 26 30 31 32 EVENT DATE REPORT OA'TE 9
6 0
7 0
4 7
6
~07 1 2~76 68 69 74 75 80 OTHER STATUS EVENT OESCRIPTION
[OD~]
See attached sheet) 7 8 9I 7
89 toO~]
7 89
~os 7 89 QOQ 7
8 9 SYSTEM CAUSE CODE CODE COMPONENT CODE LLEEEE~O IIX x "
x x
x x
7 8 9 10 11 I 12 17 CAUSE OESCRIPTION Qg See attached sheet) 7 89
[OO~)
7 89
~10 7
89 FACIUTY STATUS POWER
@~g
~c
~oo o
N/A 7
8 9
10 12 13 FORM OF ACTIVITY COATENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY
@~2
~Z Z
7 8
9 10 11 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Pg [oaooJ 2
N/A 7
89 11 12 13 PERS'ONNEL INJURIES NUMBER
'ESCRIPTION
[A<4] ~oo o
N/A 7
89 11 12 OFFSITE CONSEQUENCES Q~g N/A PRME COMPONENT SUPPLER N
43 METHOD OF DISCOVERY DISCOVERY DESCRIPTION 44 45 46 LOCATION OF RELEASE 44 45 COMPONENT MANUFACTURER 5
3 9
2 44, 47 48 80 80 80 80 80 80 80 80 80 80 80 80 7
89 LOSS OR DAMAGE TO FACILITY
,TYPE DESCRIPTION
~16 D
Blade uide handle sheared and stD 7
8 9i 10 PUBLICITY N/A 7
89 AOOITIONAL FACTORS N/A 7
89 ins bent 80 80 80 80 7
89 NAME:
PHONE'0 GPG GGT 007
Event Descri tion A blade guide assembly was being removed from the reactor as part of fuel-loading operations.
When the bottom of the blade guide assembly was approximately three feet above the upper core plate, a section of the telescoping grapple boom slipped downward.
When this section reached its normal extended position, it impulsed the lower sections which caused an abrupt force on the boom which broke the blade guide assembly handle.
The blade guide assembly fell back into the incore position from
,which it was removed.
(BFRO-50-296/761)
Cause Descri tion Interference
~between two adjacent sections of the boom as the grapple was Jj being lifted ic used one section to stop before it was fully extended.
Then the section fell to its fully-extended position.
Additional Factors All pieces of the boom and blade guide assembly were accounted for; the surrounding fuel assemblies, adjacent LPRM incore, and the fuel support piece inspected and no evidence of damage observed; and the boom was replaced with the unit 2 boom which had demonstrated reliability during fuel loading on that unit.
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