ML19338D778: Difference between revisions
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
||
Line 18: | Line 18: | ||
=Text= | =Text= | ||
{{#Wiki_filter:- - . - - - | {{#Wiki_filter:- - . - - - | ||
e-- , | e-- , | ||
^ ' | ^ ' | ||
[NRC FORM 386 : v U. S. NUCLEAR REIULATORY COMMtsSION | [NRC FORM 386 : v U. S. NUCLEAR REIULATORY COMMtsSION | ||
/17 77): | /17 77): | ||
yn -c ~ LICENSEE EVENT.RErORT | yn -c ~ LICENSEE EVENT.RErORT | ||
:( ) . - = | :( ) . - = | ||
.' I CONTROL BLOCK: l' l l ~l 'l ' 'l lh (? LEASE PRINT OR TYPE ALL REQUIRED INFORMATION) | .' I CONTROL BLOCK: l' l l ~l 'l ' 'l lh (? LEASE PRINT OR TYPE ALL REQUIRED INFORMATION) | ||
JO ['i"[l M l N l . Pl 41l Nl -,14ll 3 8"9 LICENSEE CODE 15 0 l0 l- -l 0 :-LICENSE l0 -l NUMBER 0 ' l0 l0 ? l L'l025e- l'O 26 . | JO ['i"[l M l N l . Pl 41l Nl -,14ll 3 8"9 LICENSEE CODE 15 0 l0 l- -l 0 :-LICENSE l0 -l NUMBER 0 ' l0 l0 ? l L'l025e- l'O 26 . | ||
lh4 l1 l l'l 1[ ll@57.ll~l L1 CENSE TYPE JO CAT 58 g CON'T - . .. | lh4 l1 l l'l 1[ ll@57.ll~l L1 CENSE TYPE JO CAT 58 g CON'T - . .. | ||
Line 40: | Line 34: | ||
- 75 | - 75 | ||
'7.., 68 09 EVENT DATE REPORT DATE | '7.., 68 09 EVENT DATE REPORT DATE | ||
.8' . 60 61 DOCKET NUMBER . | .8' . 60 61 DOCKET NUMBER . | ||
EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h . | EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h . | ||
Line 46: | Line 39: | ||
- frm l bolts revealed that most ~o'f the bolts had crack ' indications. Several bolts failed l. | - frm l bolts revealed that most ~o'f the bolts had crack ' indications. Several bolts failed l. | ||
~ | ~ | ||
Lo_.LJ l when' detensioning was" attempted. Unit 2 was operating at 100% power when the discoveryl. | Lo_.LJ l when' detensioning was" attempted. Unit 2 was operating at 100% power when the discoveryl. | ||
I' :10,61 lwas made. Unit >2 was, shut down the evening of 9-4-80 to perform similar inspections. l O 6 l Unit 2 b' o lts were found pre-tensioned and 3 of the total of' 48 were found cracked. I | I' :10,61 lwas made. Unit >2 was, shut down the evening of 9-4-80 to perform similar inspections. l O 6 l Unit 2 b' o lts were found pre-tensioned and 3 of the total of' 48 were found cracked. I ITT71 1 Remaining Unit,2- bolts were detensioned and inspected. All support pads were l o i8 i I provide / with' at least 5 bolts which is sufficient for LOCA plus DBE loading. l 1 i$ SO E , | ||
ITT71 1 Remaining Unit,2- bolts were detensioned and inspected. All support pads were l o i8 i I provide / with' at least 5 bolts which is sufficient for LOCA plus DBE loading. l 1 i$ SO E , | |||
OE S 8C E COMPONENT CODE SUB ODE S E | OE S 8C E COMPONENT CODE SUB ODE S E | ||
[lOl91 | [lOl91 | ||
Line 58: | Line 48: | ||
@ ,ag 18 101 21 -22 l-l 23 I o l 21 s I 24 26 l 'I 27 Io I1 l 28 29 LT_J 30 I-! | @ ,ag 18 101 21 -22 l-l 23 I o l 21 s I 24 26 l 'I 27 Io I1 l 28 29 LT_J 30 I-! | ||
31 L9_] | 31 L9_] | ||
32 | 32 N A ON T ME HOURS S8 IT1 POR 8. SUPPLI MA UPACTURER I Algl Al@ l Z l@ | ||
N A ON T ME HOURS S8 IT1 POR 8. SUPPLI MA UPACTURER I Algl Al@ l Z l@ | |||
33 34 36 l36Z l@. l0lOlOlOl.[y_l@ lYl@ | 33 34 36 l36Z l@. l0lOlOlOl.[y_l@ lYl@ | ||
37 40- 41-- 42 | 37 40- 41-- 42 | ||
Line 71: | Line 59: | ||
84 g -n | 84 g -n | ||
~ 44 4s as 80 r.ELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE | ~ 44 4s as 80 r.ELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE | ||
(,,1,,,[,,,f [Z,,,,] @D oP RELE NA ASE[2,,,j@l : l 'l NA l | (,,1,,,[,,,f [Z,,,,] @D oP RELE NA ASE[2,,,j@l : l 'l NA l | ||
' PERSONNEL EXPOS ES ' | ' PERSONNEL EXPOS ES ' | ||
NUMBER. | NUMBER. | ||
[IIIIl 0 l ' O! '0lhl TYPE | [IIIIl 0 l ' O! '0lhl TYPE | ||
,,Z,,j 'hlNADESCRIPTION | ,,Z,,j 'hlNADESCRIPTION I | ||
I | |||
* = * ' ' | * = * ' ' | ||
* ' PERSONNE'L WJU' I ES ' " . . | * ' PERSONNE'L WJU' I ES ' " . . | ||
NUMPER ' DESCRIPTION | NUMPER ' DESCRIPTION L l 1 l a l- l e l 0 ' ; Qj@l NA' l | ||
L l 1 l a l- l e l 0 ' ; Qj@l NA' l | |||
-7 8 9 . P 12 .. . | -7 8 9 . P 12 .. . | ||
80 LOSS OF OR Dr Wt TO FActLITY TYPE- D%RIPitCN .- | 80 LOSS OF OR Dr Wt TO FActLITY TYPE- D%RIPitCN .- | ||
1' 9 l l NA - | 1' 9 l l NA - | ||
l | l | ||
'is 9 -10 | 'is 9 -10 | ||
.8 80 2 o ISSdUE L l @ DESCRIPTION | |||
.8 80 | |||
~ NA l lllllllllllll$ | ~ NA l lllllllllllll$ | ||
_ 7c .8,9 _ 10 ; , | _ 7c .8,9 _ 10 ; , | ||
Line 98: | Line 78: | ||
-o | -o | ||
- NAME OF PREPARER PHONE: "s | - NAME OF PREPARER PHONE: "s | ||
;8009230741; 1 | ;8009230741; 1 | ||
, , , _ , _ , __, , ,}} | , , , _ , _ , __, , ,}} |
Latest revision as of 13:36, 31 January 2020
ML19338D778 | |
Person / Time | |
---|---|
Site: | Prairie Island |
Issue date: | 09/18/1980 |
From: | NORTHERN STATES POWER CO. |
To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
Shared Package | |
ML19338D774 | List: |
References | |
LER-80-025-01T, LER-80-25-1T, NUDOCS 8009230741 | |
Download: ML19338D778 (1) | |
Text
- - . - - -
e-- ,
^ '
[NRC FORM 386 : v U. S. NUCLEAR REIULATORY COMMtsSION
/17 77):
yn -c ~ LICENSEE EVENT.RErORT
- ( ) . - =
.' I CONTROL BLOCK: l' l l ~l 'l ' 'l lh (? LEASE PRINT OR TYPE ALL REQUIRED INFORMATION)
JO ['i"[l M l N l . Pl 41l Nl -,14ll 3 8"9 LICENSEE CODE 15 0 l0 l- -l 0 :-LICENSE l0 -l NUMBER 0 ' l0 l0 ? l L'l025e- l'O 26 .
lh4 l1 l l'l 1[ ll@57.ll~l L1 CENSE TYPE JO CAT 58 g CON'T - . ..
- l O l i l' ,"RcF "
@l n l = l nl ni nli > l~n 'l9 @ ol'91 014 18 lo @lo
~
74
-19 11' Is la 'In -80@ ~
- 75
'7.., 68 09 EVENT DATE REPORT DATE
.8' . 60 61 DOCKET NUMBER .
EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h .
110121 lWith Unit 1 in refueling shutdown,' ultrasonic examination of ' steam generator support 1
- frm l bolts revealed that most ~o'f the bolts had crack ' indications. Several bolts failed l.
~
Lo_.LJ l when' detensioning was" attempted. Unit 2 was operating at 100% power when the discoveryl.
I' :10,61 lwas made. Unit >2 was, shut down the evening of 9-4-80 to perform similar inspections. l O 6 l Unit 2 b' o lts were found pre-tensioned and 3 of the total of' 48 were found cracked. I ITT71 1 Remaining Unit,2- bolts were detensioned and inspected. All support pads were l o i8 i I provide / with' at least 5 bolts which is sufficient for LOCA plus DBE loading. l 1 i$ SO E ,
OE S 8C E COMPONENT CODE SUB ODE S E
[lOl91
- 7, 8 lC lC l@ ]@ J@ l X l Xl X l X l X l X l@ l Zl@ J @
9 to 11 12 13 18 19 2G
_ SEQUENTIAL OCCURRENCE ' REPORT REVISION LE RIRO EVENT YE AR REPORT NO. CODE TYPE NO.
@ ,ag 18 101 21 -22 l-l 23 I o l 21 s I 24 26 l 'I 27 Io I1 l 28 29 LT_J 30 I-!
31 L9_]
32 N A ON T ME HOURS S8 IT1 POR 8. SUPPLI MA UPACTURER I Algl Al@ l Z l@
33 34 36 l36Z l@. l0lOlOlOl.[y_l@ lYl@
37 40- 41-- 42
[A_l@
43 lF l1l7lOl@'
44 47 CAUSE DESCRIPTION AND CO"1RECTIVE ACTIONS h L1_Lo_j IFourVascomax 250 CVM bolt heads and one comnlete bolt were forwarded to Westinehouse 1
- Li,,J,,1,j ~lResearch and~ Development Center for analysis. Pre 14minnrv ann 1vsis inrti r aroe I L1_j,,y_l lenvironmentally assisted cracking. The cracks can be prevented bv a reduction in I i l installation torque. All Unit I bolts will be replaced and installed with a l
-- I minimum of pre-tensieri. A followun report will be submitted. l
.7- 8 9 80 ST ' % POWE R ' OTHER STATUS . DI O RY DISCOVERY DESCRIPTION j,,1.,,,j,,s,,,j l - Hl@ l O l 01 012.l@l NA l-lBl@l Inservice Inspection l 7
84 g -n
~ 44 4s as 80 r.ELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE
(,,1,,,[,,,f [Z,,,,] @D oP RELE NA ASE[2,,,j@l : l 'l NA l
' PERSONNEL EXPOS ES '
NUMBER.
[IIIIl 0 l ' O! '0lhl TYPE
,,Z,,j 'hlNADESCRIPTION I
- = * ' '
- ' PERSONNE'L WJU' I ES ' " . .
NUMPER ' DESCRIPTION L l 1 l a l- l e l 0 ' ; Qj@l NA' l
-7 8 9 . P 12 .. .
80 LOSS OF OR Dr Wt TO FActLITY TYPE- D%RIPitCN .-
1' 9 l l NA -
l
'is 9 -10
.8 80 2 o ISSdUE L l @ DESCRIPTION
~ NA l lllllllllllll$
_ 7c .8,9 _ 10 ; ,
68 69 80. %
-o
- NAME OF PREPARER PHONE: "s
- 8009230741; 1
, , , _ , _ , __, , ,