ML20237J051
| ML20237J051 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 08/21/1985 |
| From: | Strickland G TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML20237H133 | List:
|
| References | |
| ECA-.1, ECA-0.1, NUDOCS 8708170473 | |
| Download: ML20237J051 (13) | |
Text
_ _ _ _ _ _
TENNESSEE VALLEY AUTHORITY 1
SEQUOYAH NUCLEAR PLANT EMERGENCY CONTINGENCY INSTRUCTION EGA-0.1 1
RECOVERY FROM LOSS OF ALL AC POWER WITHOUT_SI REQUIRED Revision 0 PREPARED BY:
G.
Strickland RESPONSIBLE SECTION:
Operational f
REVISED BY:
N/A /,f. /
/
j ' r/
/
SUBMITTED BY:
Qgd/t /
_,_o y[
Respons,ible qection Supervisor
'TUS 211985 PORC REVIEW DATE:
APPROVED BY:
Eccd kt_{7bsm Plant i Manager j
DATE APPROVED:
AUG 211935 Reason for revision (include all Ir.struction Change Form Nos. ) -
New instruction written Der commitment to NUREG 0737.
The last page of this instruction is number:
11 8709170473 B70811 PDR ADDCK 05000327 P
l^
l, SEQUOYAH NUCLEAR PLANT i
r-PLANT INSTRUCTION REVISION LOG
\\
l l
EMERGENCY CONTINGENCY INSTRUCTION ECA-0.;
REVISION Date Pages REASON FOR REVISION (INCLUDE CCMMIT-LEVEL Aporoved Affected MENTS AND ALL ICF FOPJ4 NUMBERS }
New instruction written per commitment o
A JG 211986 ALL to NUREG 0737.
l l
I I
~
l 0347L/mbs
SQNP E C A-0.1 Unit 1 or 2 Page 1 of 11 Rev. 0
.1 RECO\\'ERY FROM LOSS OF All, AC POWER WITHOUT SI ilEOUIRED A.
PURPOSE 1.
Establish Component Cooling Water 2.
Establish normal charging and letdown 3.
Slowly restore RCP seal cooling B.
SYMPTOMS None I
C.
TRANSITION FROM OTI!ER INSTRUCTIONS r
ECA-0.0, Loss Of All AC Power i
w 1
)
i 1
I a 6
SQNP ECA-0.1 Unit or 2 Page 2 of 11 Rev. 0
\\
RECOVERY FROM LOSS OF ALL AC POWER WITHOUT 9I ItEOUIItED STEP ACTION / EXPECTED RESPONSE RESPO:SF ' OT 03T AINED Note:
The purpose of this ECA should be reviewed prior to using this instruction CAUTION:
The loads placed on the energized AC board should not I
exceed the capacity of the power supply Note:
Status Trees should be monitored for information only l
l 1
Reset Phase A And Phase B 2
Ensure Cntmt Air Supply l
j In Service a.
Air compressors - RU::NING b.
Cntmt air supply "alves an elev 714 - OPEN
- 1) FCV-32-80 (81)
- 2) FCV-32-102 (103)
- 3) FCV-32-110 (111) 3 Establish Comnonent Cooling Water Operation IF NO Component Cooling a.
IF Component Cooling a.
Water Pump running,
'70tter Pump running, TIIEN verify RCP thermal
- 'H E:: maintain Component barrier return valves -
Cuoiing Water Pump CLOSED operatic;n.ind
- 1) FCV-70-87 or 90 b.
Start one Component Cooling Water Pump h
3
1 SQNP EC A-0. L Unit I or 2 I
Page 3 of 11 Rev. 0
(
RECOVERY FROM LOSS OF ALL AC POWER WITIIOUT SI REOUIRED STEP ACTION / EXPECTED RESPONSE RES PONS E '.'OT _~> B TA L' "D 4
Establish CCP Operation a.
IF VCT level > M, a.
IF VCT level - M, THEN verify suction TilEN refill '/CT OR from VCT verify suction from RWST
- 1) FCV-62-132 and 133
- 1) FCV-62-135 and 136 OPEN OPEN
- 2) FCV-G2-135 and 136 2)
FCV-62-132 and 133 CLOSED CLOSED b.
Adjust blender for RCS boron concentration and makeup for automatic g
control Close charging FCV-62-90 e.
and 91 d.
Ensure BIT isolati6n
- 1) FCV-63-25 and 26 -
CLOSED
- 2) FCV-63-39 and 40 -
CLOSED
- Step Continued On Next Page -
." 1
l SQNP ECA-0. I Unit 1 or 2 L
Page 4 of 11 Rev. 0
.f
.(\\
RECOVERY FROM LOSS OF ALL AC POWER WITHOUT SI REQUIRED
- STEP.
ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 4
Establish CCP Operation (cont. )
IF NO CCP running, c.
[F CCP running, e.
THEN isolate RCP seal THEN maintain CCP injection using reach.
operation and continue rods outside seal water with next step injection filter cubicles -
Aux Bldg 690
- 1)62-546 seal water injection filter l
bypass isolation j
- 2)62-549 seal water injection filter A outlet isolation
- 3)62-550 seal water injection filter B outlet isolation f.
AFTER verifying RCP seal injection isolated.
THEN start one CCP 5
Establish Normal Charging a.
Close FCV-62-89 b.
Open charging line isolation FCV-ti2-90 and 91 c.
Open FCV-62-85 or 86 d.
Adjust FCV-62-89 and 93 to i
maintain pzr level > 20%
[50% FOR ADVERSE CNTNT]
l O
h 4
4 SQNP EC A-0.1 '
Unit 1 or 2 Page 5 of 11 Rev. 0 l
1 N-
. RECOVERY FROM LOSS OF ALL AC POWER-WITHOUT SI REQUIRED STEP ACTION / EXPECTED RESPONSF, RESPONSE NOT QI3TAINED_
6 Establish Letdown IF -letdown-can ;!OT be stablished a.
Open letdown isolation THEN establish e:< cess valves:
letdown
- 1) FCV-62-69
- 2) FCV-62-70
{
- 3). FCV-62-77 b.
Adjust letdown press controller. FCV-62-81,
- 25% open in manual c.
Open an orifice valve
'(
d.
Adjust FCV-62-81 for desired press, then place-in AUTO
- 1) 320 psig at normal letdown temp 7
Verif'y ECCS Not Required Control charging to maintain a.
Par level > 20% [50% FOR ADVERSE CNTMTl IF par level or RCS subcooling can NOT be maintained, b.
RCS subcooling > 10 F THEN go to
./
i i
-5
SQNP E C.\\-0.1 t' nit 1 or 2 Page ti of 11 Rev. O r.
A RECOVERY / ROM LOSS OF ALL AC POWER WITIIOUT SI REQUIRED STEP ACTION / EXPECTED RESPONSE
- 1ESPO
- SE ' OT OBTAIMFD 8
Place Following Pumps In A-Auto.
SI Pumps a.
b.
RHR Pumps c.
Cntmt Spray Pumps 9
Chect: CST Level a.
CST level > 3 f t a.
IF CST '.evel < 0 ft,
'" HEN cerify ERCW ancned :a u 'N
,e b.
CST level 17 : t b.
- CST 'evoi
- 7 ft.
s
. !!L::.it t em p t to refill s:S" th le continuing with this instruction C A UTION :
If S/G narrow range level decreases to less than 25%,
then the Motor-driven AFW Pumps should be manually started to supply water to the S/Gs.
Note:
If Motor-driven AFW Pump operation is not required, then pump should be maintained in PULL-TO-I.OCK to prevent automatic start.
10 Check Intact S/G Levels a.
Narrow range S/G a.
intact S/G l
i b.
Control S/G levels between 25% and 50'h e*
em 6-I u
__._______..__-----_-_---._--------------------------d
l t
AGN l' l
d C A-0.1 i* nit ! 'ir Page 7 of i1 Rev. 0 lr
~
l'A RECOVERY cRO31 LOSS OF.iLL.\\C POWER WITIIOUT SI REQUIRED 1
1 STEP ACTION / EXPECT".D ".ES PONSF H ES P( ).'.-; F ' CT O B T il.':EO 11 Establish S/G Press Control i
a.
Adjust S/G PORV controllers to maintain S/G press b.
Place S/G PORV controllers to AUTO J
c.
Return S/G PORV control to main control room No te :
FRGs may now be implemented as necessary 7-C.\\ U T ION -
.\\s part of suosequent recoverv actions. RCPs ;nculd not be started prior to a status waiuat:on.
C A UTION :
RCP seal injection and thermal barrier sliould be established slowly to minimize HCP thermal stresses i
and potential seal failures.
12 Establish Thermal Barrier Cooling a.
Slowly establish Component Cooling Water to thermal barrier to reduce RCP bearing temp at a ma:<imum rate of 1 F/ minute I
i
/
.~
-7
SQNP ECA-0.1 Unit 1 or 2 Page d of 11 Rev. O r
i
\\
RECOVERY FROM LOSS OF.\\LL AC POWER WITIIOUT SI REQUIRED STEP ACTION / EXPECTED RESPONSE RESPONSE.':OT OBT AINI D 13 Establish RCP Seal Injection a.
AFTER establishing Component Cooling Water to thermal barrier, THEN slowly establish seal injection flow to reduce HCP bearing temp at a maximum rate of 1 F/ minute
- 1) Open seal water return FCV-62-61 and 63
- 2) Open RCP number i seal leakoff FCV-62-9.
22, 05, and 13 r
- 3) Slowly open 62-G 12, seal, vater filter inlet.
using reach rod outsidt seal water filter cubicle Aux Bldg 690
- 4) Fully open FCV-62-89
- 5) Slowly open 62-549 or 550, seal water injection filter outlet, using reach rod outside seal water injection filter cubicle
{
Aux Bldg 690 1
I l
1 l
i
.f.
l
~,-
SQ.NP h.C A-0.1 lintt 1 o r 'J a
Page 9 of 11 Rev. O n
'A RECOVERY / ROM LOSS OF ALL AC POWER WITIIOUT SI REQUIRED STEP AC'"!ON /ENPECTED RESPONSP.
RES PO'ISE.'iOT 03T.i!.':ED 14 Establish Pzr Press Control a.
Control pzr heaters as necessary b.
Control aux sprav b.
IF aux spray NOT available.
THEN use one pzr PORV C AUTION :
Normal T-avg indication and associated interlocks vul be inaccurate during natural circulation or vnen RC3 temp is below 530 F.
. t*
'5
'.'orifv N:atural Circulat ion.-
- ". 'atural e:rculat:on
- OT verified,
a.
RCS subcooling > 40 F TlilfN increase clumping stcam irom.ntact n.,6,s i
b.
S/G press - STABLE OR DECREASING c.
T-hot - STABLE OR DECREASING d.
Core exit T/C - STABLE OR DECREASING e.
T-cold - AT S ATURATION TEMP FOR S/G PRESS e
i l. _ _ _ _ _ _ _ _
?QNP E C A-0.1 Unit 1 or 2 Page 10 of 11 7,
Rev. 0
. l A
RECOVERY FROM LOSS OF.\\LL AC POWER WITHOUT.il REQUIRED STEP ACTION / EXPECTED RESPONSE
- ' ES PO? S E '.'O':'
OBT.\\ i:;r D 16 Check If Source Range Detectors Should Be Energized a.
Check intermediate range a.
WHEN intermediate.
-10
-10 flux range < 10 amps flux < 10
- amps, THEN ensure source range detectors energized b.
Ensure source range detectors energized c.
Transfer NR-45 to one source and intermediate range f
17 Verifv Shutdown Marz_i_n Perfo'rm shutdown margin a.
calculation per SI-38 18 Maintain Stable Plant Conditions a.
RCS press b.
Pzr level l
c.
RCS temp d.
Intact S/G levels e
h - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _. _ _. _-___- __ _________________
I i
SQNP EC A-0. I l' nit 1 or ?
Page 11 of 11 Rev O r~
N-RECOVERY 7ROSI LOSS OF ALL AC POWER WITIIOtIT SI REQl!1 RED STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 19 Verify ECCS Not Required Control charging to maintain pzr level and a,
Par level > 20% [50% FOR RCS subcooling ADVERSE CNTMTl IF pzr level or RCS b.
RCS subcooling > 40 F subcooling can NOT be main tained.
THEN go to
- ECA 0.2.
RECOVERY FRO >l LOSS OF ALL AC POWER WITH SI REQUIRED t
i i
20 Go To Applicable Instruction a.
AOI-35. Loss Of Offsite
/
Power
~
b.
ES-0.. ' atural Circuat:ca Cooldown
-END-
/
. )
L
__