ML19323F183: Difference between revisions
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nr.e rain. en . v.s .xtrui accut.atoav cor.estissio-lt 118 LICE 'SEE EVE *'T HEPORT EXHtt31T ," | nr.e rain. en . v.s .xtrui accut.atoav cor.estissio-lt 118 LICE 'SEE EVE *'T HEPORT EXHtt31T ," | ||
9 oc:. .:.+ .: ~ [ t ! L J....t | 9 oc:. .:.+ .: ~ [ t ! L J....t | ||
.J, @ 1.t t e.v. rne. o s n . : r . . e t:vinto isrc a.ee.no .i | .J, @ 1.t t e.v. rne. o s n . : r . . e t:vinto isrc a.ee.no .i | ||
! (_{ill. .{ T 'N IS 1 N !-n-- | ! (_{ill. .{ T 'N IS 1 N !-n-- | ||
P' 1 !-?'O I O I 10 [ 01 . . | |||
P' 1 !-?'O I O | |||
I 10 [ 01 . . | |||
Ci O Ci i01 0 F." ....u . | Ci O Ci i01 0 F." ....u . | ||
'.i it1fli1J,.9! | '.i it1fli1J,.9! | ||
- < . u I l@ | - < . u I l@ | ||
o ,.. r | o ,.. r | ||
''' 0 5 f 0l 0 1 01 3 i '' ' 7 . " O!5 | ''' 0 5 f 0l 0 1 01 3 i '' ' 7 . " O!5 | ||
* O1918 ! 0 ? : 0i Si 2 l 2! 8f 0 !@ | * O1918 ! 0 ? : 0i Si 2 l 2! 8f 0 !@ | ||
1 E, Ej . | 1 E, Ej . | ||
' : L K' i 0_ | ' : L K' i 0_ | ||
1.c.. h . | 1.c.. h . | ||
i.:me w s o t .:. . . , u ......,.. . | |||
i.:me w s o | |||
t .:. . . , u ......,.. . | |||
.u,:.......v. ,.,.u .- . . . . , , ..e, | .u,:.......v. ,.,.u .- . . . . , , ..e, | ||
[r_T J The ef fect of environmental teeperature en the set;cints of the = sin m | [r_T J The ef fect of environmental teeperature en the set;cints of the = sin m | ||
t - | t - | ||
3 p_v.Lq , stcac safety valves was not taken inte censideratien in the design | 3 p_v.Lq , stcac safety valves was not taken inte censideratien in the design r.i..T. _T.'.l u_n_c i. .v c ia . | ||
r.i..T. _T.'.l u_n_c i. .v c ia . | |||
t If the valve rec: ter:Terature drppped .t alev 50CF or vont above_ | t If the valve rec: ter:Terature drppped .t alev 50CF or vont above_ | ||
E~Il'} !12095, the_ r:etpoint vitr.iatiqn. vridd_ m crei.i;ha_all:.5-Id.C IClerCaffio.f ASME = | E~Il'} !12095, the_ r:etpoint vitr.iatiqn. vridd_ m crei.i;ha_all:.5-Id.C IClerCaffio.f ASME = | ||
ET,j LSection III code. Th.e_qqnsqquerm. of tS D: o ccurr- c o ie r. <'c l ig ihin_ ar.d p_.r..! ._does not pose a dange.r.. to public heci._ch. cnd safety. _ | ET,j LSection III code. Th.e_qqnsqquerm. of tS D: o ccurr- c o ie r. <'c l ig ihin_ ar.d p_.r..! ._does not pose a dange.r.. to public heci._ch. cnd safety. _ | ||
._ nil-...__...___.._-.-.. _ . . . _ . . . . . . - . . - | ._ nil-...__...___.._-.-.. _ . . . _ . . . . . . - . . - | ||
s,:s t . | s,:s t . | ||
u .1 us | u .1 us | ||
.s i | .s i | ||
-.x 2 .: . ;s | -.x 2 .: . ;s | ||
.s s u... | |||
.s | |||
s u... | |||
:..u :- | :..u :- | ||
[_] ] | [_] ] | ||
f IC ! C I 'd [la H @) B_.l O I X!%'X 'X i X8 X 'E I | f IC ! C I 'd [la H @) B_.l O I X!%'X 'X i X8 X 'E I | ||
'X'O 'a'Z A. | 'X'O 'a'Z A. | ||
.: .t... .: . ,s. . . . . =i en . | .: .t... .: . ,s. . . . . =i en . | ||
: t..or. s.. .. s - sa * :- | : t..or. s.. .. s - sa * :- | ||
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[O it_4.16Jt ;, ! | [O it_4.16Jt ;, ! | ||
- 4 [-] i .t 0 i 1-1 u T' [-j t 0 ,1 | |||
- 4 [-] i .t 0 i 1- | |||
1 u T' [-j t 0 ,1 | |||
,, as .i | ,, as .i | ||
: p. e - ._ , , ..: ; * , ; *f, ; . , . . | : p. e - ._ , , ..: ; * , ; *f, ; . , . . | ||
Line 105: | Line 60: | ||
i' 0 :0 l 0 ,~01 i | i' 0 :0 l 0 ,~01 i | ||
!X !',.'"-.' i . i *L-Z '.' L | !X !',.'"-.' i . i *L-Z '.' L | ||
' Z. 1 c . | ' Z. 1 c . | ||
* Y ' u.? !_N ~~ 1_2 ;d_10 ZI919 19 | * Y ' u.? !_N ~~ 1_2 ;d_10 ZI919 19 38 4; L. | ||
38 4; L. | |||
4 4; 4.5 44 2 8 w.. .ar . :w u. n. - Q.) | 4 4; 4.5 44 2 8 w.. .ar . :w u. n. - Q.) | ||
riTriIFailure to consider the effects of variaticas in stvironcent tenperature | riTriIFailure to consider the effects of variaticas in stvironcent tenperature | ||
;,1,i!on opening prcosure of main stca: safety valve precurencnt specifications - | ;,1,i!on opening prcosure of main stca: safety valve precurencnt specifications - | ||
[,i | [,i | ||
? 1cr in envircnmental centrol._c.vstc= desinn tenterature range. A design i,i i t evaluation is being perfor ied to determine cerrective action rer;uired, I, T.C . , ._' ,.,,. . | |||
? 1cr in envircnmental centrol._c.vstc= desinn tenterature range. A design i,i i t evaluation is being perfor ied to determine cerrective action rer;uired, | |||
I, T.C . , ._' ,.,,. . | |||
.c . | .c . | ||
.rai. .r. ..o ._ ...... | .rai. .r. ..o ._ ...... | ||
Fi?.')*LBIC 101 010 j5..i N/A 's'.' Desian review . | Fi?.')*LBIC 101 010 j5..i N/A 's'.' Desian review . | ||
3 | 3 | ||
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Line 141: | Line 80: | ||
s t. z~.. a., ! n1~A. | s t. z~.. a., ! n1~A. | ||
,. ., Sj A . | ,. ., Sj A . | ||
- ^# | - ^# | ||
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_N./ A | _N./ A | ||
. v. . . . . . . ...u | . v. . . . . . . ...u | ||
(..; | (..; | ||
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; .' N/A l | ; .' N/A l | ||
; | ; | ||
' '' d q [t.7.., .. - . - . . _ . . . . | |||
' '' d | |||
q [t.7.., .. - . - . . _ . . . . | |||
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3 | 3 | ||
* es:- .;. . .t v | * es:- .;. . .t v | ||
.,.c.p' | .,.c.p' | ||
= i . | = i . | ||
N/A i iir: rit !*I'! | N/A i iir: rit !*I'! | ||
E, i7 :- .5N, . | E, i7 :- .5N, . | ||
\' ,. . o > j | \' ,. . o > j | ||
. , . . . ,. S t e.v..e_ :',cht - | . , . . . ,. S t e.v..e_ :',cht - | ||
615-842-0295 1 1 | |||
i 80052804A . . ._._ _. | |||
615-842-0295 1 | |||
80052804A . . ._._ _ | |||
,,g. - w- s 9 --.e e "P tr | ,,g. - w- s 9 --.e e "P tr | ||
, . ,, Tenn:ssza Valley Authority | , . ,, Tenn:ssza Valley Authority | ||
.< Sequoyah Nucicar Plant | .< Sequoyah Nucicar Plant LER SUPPLEMENTAL IUPORMATION SCEG-50-327/ 8046 Technical Specification Involved 6.9.1.12.1 Reported I'nder Technical Specification 6.9.1.12.1 te ci Oc urrence: 5/9/80 Time of occurrenec: | ||
LER SUPPLEMENTAL IUPORMATION | |||
SCEG-50-327/ 8046 Technical Specification Involved 6.9.1.12.1 Reported I'nder Technical Specification 6.9.1.12.1 | |||
ID.'6 CDST Unit 1 Identit'icatien and Descriptica of_Gecurrence: | ID.'6 CDST Unit 1 Identit'icatien and Descriptica of_Gecurrence: | ||
A de:cirn ruview discovered that consideratien had net been taken for the effects of varyir.g temperatures in the main steur. valve reorc on tre setpoints of the mair etcam safety valves. Analysis shcwed that veristion in the setpoints could exceed the allovable tolerances of paragraph NC-7641.2 of ASMI Section III code if the valve room tsoperatures ran greater then 120cF or less than 500F, If the | A de:cirn ruview discovered that consideratien had net been taken for the effects of varyir.g temperatures in the main steur. valve reorc on tre setpoints of the mair etcam safety valves. Analysis shcwed that veristion in the setpoints could exceed the allovable tolerances of paragraph NC-7641.2 of ASMI Section III code if the valve room tsoperatures ran greater then 120cF or less than 500F, If the roo= tempcratures drtpped below 50"F the possibility exist that auxiliary feed-water systen perforr:ance could be degraded due to increased s can generator prensure. | ||
Conditienc Prior to Occurrence: | Conditienc Prior to Occurrence: | ||
Unit 1 in !bde 4 during syste= hestup (<3500f) . | Unit 1 in !bde 4 during syste= hestup (<3500f) . | ||
Line 214: | Line 120: | ||
N/A I i | N/A I i | ||
l | l | ||
, .. ._.}} | , .. ._.}} |
Revision as of 02:57, 1 February 2020
ML19323F183 | |
Person / Time | |
---|---|
Site: | Sequoyah ![]() |
Issue date: | 05/22/1980 |
From: | Maehr S TENNESSEE VALLEY AUTHORITY |
To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
Shared Package | |
ML19323F178 | List: |
References | |
LER-80-046-01T, LER-80-46-1T, NUDOCS 8005280622 | |
Download: ML19323F183 (2) | |
Text
. . ._ - ..
nr.e rain. en . v.s .xtrui accut.atoav cor.estissio-lt 118 LICE 'SEE EVE *'T HEPORT EXHtt31T ,"
9 oc:. .:.+ .: ~ [ t ! L J....t
.J, @ 1.t t e.v. rne. o s n . : r . . e t:vinto isrc a.ee.no .i
! (_{ill. .{ T 'N IS 1 N !-n--
P' 1 !-?'O I O I 10 [ 01 . .
Ci O Ci i01 0 F." ....u .
'.i it1fli1J,.9!
- < . u I l@
o ,.. r
' 0 5 f 0l 0 1 01 3 i ' 7 . " O!5
- O1918 ! 0 ? : 0i Si 2 l 2! 8f 0 !@
1 E, Ej .
' : L K' i 0_
1.c.. h .
i.:me w s o t .:. . . , u ......,.. .
.u,:.......v. ,.,.u .- . . . . , , ..e,
[r_T J The ef fect of environmental teeperature en the set;cints of the = sin m
t -
3 p_v.Lq , stcac safety valves was not taken inte censideratien in the design r.i..T. _T.'.l u_n_c i. .v c ia .
t If the valve rec: ter:Terature drppped .t alev 50CF or vont above_
E~Il'} !12095, the_ r:etpoint vitr.iatiqn. vridd_ m crei.i;ha_all:.5-Id.C IClerCaffio.f ASME =
ET,j LSection III code. Th.e_qqnsqquerm. of tS D: o ccurr- c o ie r. <'c l ig ihin_ ar.d p_.r..! ._does not pose a dange.r.. to public heci._ch. cnd safety. _
._ nil-...__...___.._-.-.. _ . . . _ . . . . . . - . . -
s,:s t .
u .1 us
.s i
-.x 2 .: . ;s
.s s u...
- ..u :-
[_] ]
f IC ! C I 'd [la H @) B_.l O I X!%'X 'X i X8 X 'E I
'X'O 'a'Z A.
.: .t... .: . ,s. . . . . =i en .
- t..or. s.. .. s - sa * :-
'Il_(. -8 l 0i
[O it_4.16Jt ;, !
- 4 [-] i .t 0 i 1-1 u T' [-j t 0 ,1
,, as .i
- p. e - ._ , , ..: ; * , ; *f, ; . , . .
- i. t .. . .. ..., ,. s. . ..s.s, . e. . e . . - .s.v.
i' 0 :0 l 0 ,~01 i
!X !',.'"-.' i . i *L-Z '.' L
' Z. 1 c .
- Y ' u.? !_N ~~ 1_2 ;d_10 ZI919 19 38 4; L.
4 4; 4.5 44 2 8 w.. .ar . :w u. n. - Q.)
riTriIFailure to consider the effects of variaticas in stvironcent tenperature
- ,1,i!on opening prcosure of main stca
- safety valve precurencnt specifications -
[,i
? 1cr in envircnmental centrol._c.vstc= desinn tenterature range. A design i,i i t evaluation is being perfor ied to determine cerrective action rer;uired, I, T.C . , ._' ,.,,. .
.c .
.rai. .r. ..o ._ ......
Fi?.')*LBIC 101 010 j5..i N/A 's'.' Desian review .
3
. . - ,.i
.. L..A .
. .. , . ;. .
. - c. .. . i;) i
. ;;. . .. v.t :s @ '
F, T 1 __z.j L, o_.
s t. z~.. a., ! n1~A.
,. ., Sj A .
- ^#
i E, L,1 i d't 'di e .W;!$ '.;;
, . i-
_N./ A
. v. . . . . . . ...u
(..;
. y f.'0__!:D,.(
- .' N/A l
' d q [t.7.., .. - . - . . _ . . . .
gj _.
3
- es:- .;. . .t v
.,.c.p'
= i .
N/A i iir: rit !*I'!
E, i7 :- .5N, .
\' ,. . o > j
. , . . . ,. S t e.v..e_ :',cht -
615-842-0295 1 1
i 80052804A . . ._._ _.
,,g. - w- s 9 --.e e "P tr
, . ,, Tenn:ssza Valley Authority
.< Sequoyah Nucicar Plant LER SUPPLEMENTAL IUPORMATION SCEG-50-327/ 8046 Technical Specification Involved 6.9.1.12.1 Reported I'nder Technical Specification 6.9.1.12.1 te ci Oc urrence: 5/9/80 Time of occurrenec:
ID.'6 CDST Unit 1 Identit'icatien and Descriptica of_Gecurrence:
A de:cirn ruview discovered that consideratien had net been taken for the effects of varyir.g temperatures in the main steur. valve reorc on tre setpoints of the mair etcam safety valves. Analysis shcwed that veristion in the setpoints could exceed the allovable tolerances of paragraph NC-7641.2 of ASMI Section III code if the valve room tsoperatures ran greater then 120cF or less than 500F, If the roo= tempcratures drtpped below 50"F the possibility exist that auxiliary feed-water systen perforr:ance could be degraded due to increased s can generator prensure.
Conditienc Prior to Occurrence:
Unit 1 in !bde 4 during syste= hestup (<3500f) .
Actica specified in the Technic 01 Specificatica Surveillance ?cquirecents met due to inocerable eculutent.
N/A Apparent Catme of Occurrenec: -
Failure to cer. sider the effects of variaticas in enviren=cutal tc perature on 1 opcning pressure of main stens safety valve precurc=ent specifications or in environnental control systen design tceperature rcnga.
1 Anal:,ais of Occurrence:
No danger to public health and safety.
Corrective Action:
Further analyals is being dcne to detertine if the expected reca temperatures could fall outside the acceptcbic r:nge ar.d if so, what design change would be necessary to maintain it within the neceptabic range (5007 - 120 F) .
Failure Data:
N/A I i
l
, .. ._.