ML19305D810: Difference between revisions
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hROFoAM744 U. S. NUCLE AR REGUL AToRY CoMvi15l ora LICENSEE EVENT REPORT EXHIBIT A cc 4 Tao'.cLocic: l l l l l 1 .@ i l (PLtast ranNT on TYet ALL t:toUinso iston .:Ariow I c i t 1 I.T&...... | hROFoAM744 U. S. NUCLE AR REGUL AToRY CoMvi15l ora LICENSEE EVENT REPORT EXHIBIT A cc 4 Tao'.cLocic: l l l l l 1 .@ i l (PLtast ranNT on TYet ALL t:toUinso iston .:Ariow I c i t 1 I.T&...... | ||
> 4 h IS coo. | > 4 h IS coo. | ||
. IN I Pl1 l | . IN I Pl1 l | ||
..@ul0 !O I -!O .1010'.O . . . . . . . ..4I O l- 101 Ol@l . 2. 4 l m 11111 | ..@ul0 !O I -!O .1010'.O . . . . . . . ..4I O l- 101 Ol@l . 2. 4 l m 11111 11 ~l@!, . . .I . . l@ | ||
11 ~l@!, . . .I . . l@ | |||
CO . T . . | CO . T . . | ||
le. l "l',i;! 111@l015101010131217 d 64 GI o f 3t 2 f6 I 8101@l ts..7;&T3 74 7 i I l ! I l@ | le. l "l',i;! 111@l015101010131217 d 64 GI o f 3t 2 f6 I 8101@l ts..7;&T3 74 7 i I l ! I l@ | ||
Line 39: | Line 27: | ||
#- : i I tnit 1 in Mode 6 with all fuel leaded. There is 'a possibility of not 1 | #- : i I tnit 1 in Mode 6 with all fuel leaded. There is 'a possibility of not 1 | ||
~ ~ | ~ ~ | ||
m t caintaining -a'lidit'ab'le con'tr'ol room due to leakana of unfiltered out- t | m t caintaining -a'lidit'ab'le con'tr'ol room due to leakana of unfiltered out- t | ||
~ | ~ | ||
Line 49: | Line 36: | ||
c i!#H: e.,:.i.:::2i J'W . | c i!#H: e.,:.i.:::2i J'W . | ||
i: i o I s ic l@ g@ [_A,g@ l Z ' Z! Z l Zl Z l Z l@ J.11[ZJ @ [Zj @ | i: i o I s ic l@ g@ [_A,g@ l Z ' Z! Z l Zl Z l Z l@ J.11[ZJ @ [Zj @ | ||
3 4 3 se is n; tJ se iv 34 | |||
!!!'.t .tsat o; ' s eg. cg RivilsOM | !!!'.t .tsat o; ' s eg. cg RivilsOM | ||
. vl%fvtan Is as * .'J C033 . pig tveo,m. ? *.o | . vl%fvtan Is as * .'J C033 . pig tveo,m. ? *.o | ||
@ .".,g s og I(I 8101 (__j | @ .".,g s og I(I 8101 (__j | ||
Line 67: | Line 53: | ||
,.,.,i supply of pressurizing air te > ' .:rol room and openings for motor drive i | ,.,.,i supply of pressurizing air te > ' .:rol room and openings for motor drive i | ||
,, ,, , belts for smoke removal fan. Ivo dampers will be added to seal off i i..I] nortal pressurizine sucolv air and smoke removal fan will be reolaced by I | ,, ,, , belts for smoke removal fan. Ivo dampers will be added to seal off i i..I] nortal pressurizine sucolv air and smoke removal fan will be reolaced by I | ||
,, ,, , direct drive fan. , | ,, ,, , direct drive fan. , | ||
574 .5 *. ,0fet R Cf ee(n g f A rg; .;. .* pegggy gggy gag st,ses, t g,.. | 574 .5 *. ,0fet R Cf ee(n g f A rg; .;. .* pegggy gggy gag st,ses, t g,.. | ||
12 | 12 | ||
Line 75: | Line 59: | ||
I | I | ||
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( . . | ( . . | ||
wave or ent,Artn Frank Robinson | wave or ent,Artn Frank Robinson | ||
,,,,,,,;M F M b M M | ,,,,,,,;M F M b M M | ||
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t 800.4150547 | t 800.4150547 | ||
Y . | |||
Tennbasee Valley Authority Sequoyah Nuclear Plant LER SUPPLEMENTAL INFORMATION SQRO-50-327/ 8019 Technical Specification Involved 3.7.7.1 Reported Under Technical Specification: 6.9.1.12.1 Date of occurrence: 3/26/80 Time of Occurrence: 1620 EST Unit 1 Identification and Description of Occurrence: | Tennbasee Valley Authority Sequoyah Nuclear Plant LER SUPPLEMENTAL INFORMATION SQRO-50-327/ 8019 Technical Specification Involved 3.7.7.1 Reported Under Technical Specification: 6.9.1.12.1 Date of occurrence: 3/26/80 Time of Occurrence: 1620 EST Unit 1 Identification and Description of Occurrence: | ||
There is a possibility of not maintaining a habitable control room due to leakage of unfiltered outside air into the main control room (EL. 732.0'). | There is a possibility of not maintaining a habitable control room due to leakage of unfiltered outside air into the main control room (EL. 732.0'). | ||
Conditions Prior to Occurrence: | Conditions Prior to Occurrence: | ||
Unit 1 in Mode 6 with all fuel loaded. | Unit 1 in Mode 6 with all fuel loaded. | ||
Action specified in the Technical Specification Surveillance Requirements met due to inoperable equipment. | Action specified in the Technical Specification Surveillance Requirements met due to inoperable equipment. | ||
P N/A Apparent Cause of Occurrence | P N/A Apparent Cause of Occurrence | ||
; | ; | ||
The leakage could come from (1) isolation dampers which shut off normal supply of pressurizing air to tbc main control room (El. 732.0') and (2) openings for the motor drive belts for the smoke removal fan. The smoke removal fan is connected to the battery room exhaust duct which passes through control room (El. 732.0'). | The leakage could come from (1) isolation dampers which shut off normal supply of pressurizing air to tbc main control room (El. 732.0') and (2) openings for the motor drive belts for the smoke removal fan. The smoke removal fan is connected to the battery room exhaust duct which passes through control room (El. 732.0'). | ||
Analysis of Occurrence: | Analysis of Occurrence: | ||
There was no danger to the health and safety of the public. | There was no danger to the health and safety of the public. | ||
Line 137: | Line 93: | ||
The pressurizing supply duct will be disconnected from the return plenum for the air handling units. Two motor-operated dampers will be added to seal off the normal pressurizing supply air to the main control room elevation 732.0'. The existing smoke removal fan will be replaced with a direct drive fan that has the motor enclosed in the fan housing. The above changes will be made prior to initial criticality. | The pressurizing supply duct will be disconnected from the return plenum for the air handling units. Two motor-operated dampers will be added to seal off the normal pressurizing supply air to the main control room elevation 732.0'. The existing smoke removal fan will be replaced with a direct drive fan that has the motor enclosed in the fan housing. The above changes will be made prior to initial criticality. | ||
Failure Data: | Failure Data: | ||
N/A | N/A e | ||
e 1}} | |||
1}} |
Revision as of 13:32, 1 February 2020
ML19305D810 | |
Person / Time | |
---|---|
Site: | Sequoyah ![]() |
Issue date: | 04/08/1980 |
From: | Robinson F TENNESSEE VALLEY AUTHORITY |
To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
Shared Package | |
ML19305D804 | List: |
References | |
LER-80-019-01T-01, LER-80-19-1T-1, NUDOCS 8004150547 | |
Download: ML19305D810 (2) | |
Text
. s N
hROFoAM744 U. S. NUCLE AR REGUL AToRY CoMvi15l ora LICENSEE EVENT REPORT EXHIBIT A cc 4 Tao'.cLocic: l l l l l 1 .@ i l (PLtast ranNT on TYet ALL t:toUinso iston .:Ariow I c i t 1 I.T&......
> 4 h IS coo.
. IN I Pl1 l
..@ul0 !O I -!O .1010'.O . . . . . . . ..4I O l- 101 Ol@l . 2. 4 l m 11111 11 ~l@!, . . .I . . l@
CO . T . .
le. l "l',i;! 111@l015101010131217 d 64 GI o f 3t 2 f6 I 8101@l ts..7;&T3 74 7 i I l ! I l@
M.*Q97 Daft .4 3 4 64 61 ;;,. 8 f *..*. 3 3 4 E v t'.? !.t s Pr*Tf ora ANo Paosastt CONSEC.!*.:Is (' .
- - : i I tnit 1 in Mode 6 with all fuel leaded. There is 'a possibility of not 1
~ ~
m t caintaining -a'lidit'ab'le con'tr'ol room due to leakana of unfiltered out- t
~
i, . I ; side air into the main control recs. (TS 3.7.7.1) There is no danger to 1 i.,,i the health and safety of the public. Previous occurrence - None. ,
i- s i t i I: : I1
- I i: ,I I
, a3 **
'un" *^d!
c i!#H: e.,:.i.:::2i J'W .
i: i o I s ic l@ g@ [_A,g@ l Z ' Z! Z l Zl Z l Z l@ J.11[ZJ @ [Zj @
3 4 3 se is n; tJ se iv 34
!!!'.t .tsat o; ' s eg. cg RivilsOM
. vl%fvtan Is as * .'J C033 . pig tveo,m. ? *.o
@ .".,g s og I(I 8101 (__j
.:.g L:. l 0 i il 9 i g [0[il [_r_j u
[_j [_gj n
n u >. a :, n a 2.
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cx st cas:araTiera Anocomasenv actic.s @
31 ,;i l The leakage could come from igstion da=cers which' shut off normal i
~
,.,.,i supply of pressurizing air te > ' .:rol room and openings for motor drive i
,, ,, , belts for smoke removal fan. Ivo dampers will be added to seal off i i..I] nortal pressurizine sucolv air and smoke removal fan will be reolaced by I
,, ,, , direct drive fan. ,
574 .5 *. ,0fet R Cf ee(n g f A rg; .;. .* pegggy gggy gag st,ses, t g,..
12
- 1 [.li,j@ 10 10 l Ol@l N/A I (D_j@lNotificationfromA/E "
I
' ' Art.v:t, cc';i t .? "
.e ".oc.r
- y. C, Acm ev @ " tocar o= o . tau @
lulbsutj-L_Jgl i E. raw N/A l l N/A l
.c. . ei . u ,..ac.m ivet ec:i;....,:o @
I,..i!OIO!0l@[;Lj@l N/A l
,. s:.... d',.. , 'J.n "
- x. .c n om ,,,, o .@
'li.1}01O!0l@l N/A j
, . , i. . w A
.{.*.1
...e C, t R eDA tw ...Afn C,1,,)
, , f ACitg l fU.
PT 1 [.Zj@l N/A I o'm t i* u*t v
- L,t.r ) b, , 8,!'"' Tg'.l.,,,,,,3., @ l'/ A l tIiltI!t1I1!!
( . .
wave or ent,Artn Frank Robinson
,,,,,,,;M F M b M M
.~
t 800.4150547
Y .
Tennbasee Valley Authority Sequoyah Nuclear Plant LER SUPPLEMENTAL INFORMATION SQRO-50-327/ 8019 Technical Specification Involved 3.7.7.1 Reported Under Technical Specification: 6.9.1.12.1 Date of occurrence: 3/26/80 Time of Occurrence: 1620 EST Unit 1 Identification and Description of Occurrence:
There is a possibility of not maintaining a habitable control room due to leakage of unfiltered outside air into the main control room (EL. 732.0').
Conditions Prior to Occurrence:
Unit 1 in Mode 6 with all fuel loaded.
Action specified in the Technical Specification Surveillance Requirements met due to inoperable equipment.
P N/A Apparent Cause of Occurrence
The leakage could come from (1) isolation dampers which shut off normal supply of pressurizing air to tbc main control room (El. 732.0') and (2) openings for the motor drive belts for the smoke removal fan. The smoke removal fan is connected to the battery room exhaust duct which passes through control room (El. 732.0').
Analysis of Occurrence:
There was no danger to the health and safety of the public.
Corrective Action:
The pressurizing supply duct will be disconnected from the return plenum for the air handling units. Two motor-operated dampers will be added to seal off the normal pressurizing supply air to the main control room elevation 732.0'. The existing smoke removal fan will be replaced with a direct drive fan that has the motor enclosed in the fan housing. The above changes will be made prior to initial criticality.
Failure Data:
N/A e
e 1