ML20033A471
| ML20033A471 | |
| Person / Time | |
|---|---|
| Site: | Shoreham File:Long Island Lighting Company icon.png |
| Issue date: | 11/23/1981 |
| From: | LONG ISLAND LIGHTING CO. |
| To: | |
| Shared Package | |
| ML20033A463 | List: |
| References | |
| TASK-1.C.8, TASK-TM 29.023.05-DRFT, NUDOCS 8111250474 | |
| Download: ML20033A471 (7) | |
Text
~
~
a ~
~
Subnitted:
SP Number 29.023.05 Approved:
Revision: F (Plant Manager)
Effective Date
' l RAPID RPV DEPRESSURIZATION
. -x@
c'M*9?y, N
EMERGENCY PROCEDURE i
1 3 1.<
L:-: % v ~ N.k.
1.0 PURPOSE 4 ;" -' "
p The purpose of this procedure is to rapidly depressurize the RPV to allow injection systems to inject and restore RPV water level to an acceptable level above TAF.
2.0 ENTP,Y CONDITIONS This procedure is entered from the following Emergency Procedures:
2.1 SP 29.023.03 (Containment Control) when:
2.1.1 Suppressiva Pool temperature and RPV pressure cannot be maintained below the heat capacity temperature limit.
2.1.2 Drysell temperature near the cold reference leg instrument vertical runs has ir. creased to the RPV saturation limit.
2.1.3 Drfwell temperature cannot be nai.caincd below 296*F.
2.1.4 Suppression Pool Water Level cannot be maintained above the heat capacity level limit.
i 2.2 SP 29.023.04 (Level Restoration) when:
2.2.1 RPV water level cannot be determined ~and at least one normal injection or alternate injection subsystem is lined up with at least one pump running.
2.2.2 R: i water level is increasing, RPV pressure is between 110 psig and 333 psig and is increasing, HPCI and RCIC are not available.
i 2.2.3 RPV water level is increasing, RPV pressure is less than 110 psig and RPV pressure is increasing.
l 2.2.4 RPV water level is decreasing, RPV pressure is greater than 333 l
psig, CRD is not operating and at least two injection subsystems l
are lined up for injection with pumps running.
2.2.5 RPV water level is decreasing, RPV pressure is less than 333 psig, any injection or alternate injection subsystem is lined up with j
pumps running and RPV pressure is increasing.
SP 29.023.05 Rev. F
.h[$I
/ /
Page 1 of 7 g
Il 'E 8111250474 811123 PDR ADOCK 05000322
_ E.
.PDR
9 2.2.6 RfV water 1sval is dtcreasing,-RPV presture in grsater thin 333 psig and low pressure injection subsystems or alternate injection subsystems are lined up for_ injection with at least one pump running.
3.0 OPERATOR ACTION CAUTION Do not depressurize the RPV below 110 psig unless motor driven' pumps sufficient to maintain RPV water level are running and the systems j are available for injection.
CAUTION NPSH requirements for pumps taking a suction for the Suppression Pool.
. require a minimun level of 14 feet.
l CAUTION Cooldown rates greater than 100*F/hr may be required to accomplish steps 3.1, 3.2, Ojt 3.3.
3.1 Open all ADS valves.
3.2 IF not all ADS valves can be
- opened, THEN open other SRV's until a total of 7 valves are open.'
i CAUTION Defeating isolation interlocks may be required to complete step 3.3.
i 3.3
~--IF less than 3 SRV's can be opened, 3.3 NOTE l
Use in the order which will i
THEN rapidly depressurize the minimize radioactive release I
RPV using one or more of the to the environment.
t following systems.
l i
l
+
i -
SP 29.023.05 Rev. F
/ /
Page 2 aof 7 3 -
3.3.1 RCIC 3.3.1 Ref. SP 23.119.01 (Reactor Core
_ Isolation Cooling (RCIC) System) 3.3.2 HPCI 3.3.2 Ref. SP _23.202.01 (High Pressure Coolant Injection)'
3.3.3 Main Turbine Bypass 3.3.3 Ref. SP 22.005.01 Valves (Shutdown to Cold Shutdown) 3.3.4 Steam Jet Air Ejectors 3.3.4 Ref. SP 23.701.01 (Condenser Off-Gas Removal) i 3-
.3.3.5 RFPTS 3.3.5 -Ref. SP 23.109.01 i
(Feed Water. System) 3.3.6 Steam Seal Evaporator 3.3.6 Ref. SPL 23.124.01
-(Steam Sealing) 3.3.7 thin condenser 3.3.7 Ref. SP 23.103.01
[
Deaerating Steam (Condensate) l 3.3.8 RPV Head Vent 1
l1 3.3.9 Main Steam Line Drains 3.3.9 Ref. SP 23.116.01 (tiain and Auxiliary Steam) 3.3.10 RNCU (Blowdown Mode) 3.3.10 Ref. SP 23.701.01 (Reactor Water Cleanup System) l l
l i
i l
SP 29.023.05 Rev. F
/ /
Page 3 of.7
3.4-Il[ suppression chsmbnr pressure 3.4 NOTE cannot be maintained below the Drywell cold reference leg.
pressure suppression limit (Fig. 1) temperature instruments. are.
(later) y RPV water level cannot be
- determined E
Temperature near the cold reference leg instrument
-vertical runs reaches the RPV saturation limit (Fig. 2)
-THEN proceed to SP 29.023.09 T177 Flooding) 3.5 Il[ suppression chamber pressure can be maintained _below the pressure suppression limit (Fig. 1).
AND
'RPV water level can be dete rmined AND Temperature near the. cold reference leg vertical runs is below the RPV saturation limit (Fig. 2)
THEN proceed to SP 29.023.01 (Level Control) step 3.2.
4.0 REFERENCES
4.1~
SP 29.023.03 Containment Control 4.2 SP 29.923.94 Level Restoration 4.3 SP 29.023.09 RPV Flooding 4.4 SP 22.005.01 Shutdown to Cold Shutdown 4.5 SP 23.-119.01 Reactor Core Isolation Cooling (RCIC) System 4.6 SP 23.202.01 Iligh Pressure Coolant Injection
~
SP 29.023.05 Rev. F
/ /
Page 4 of 7
~4.7 SP 23.121.01 R:sidual H:at Renoval (RHR) System 4.8 SP 23.701.01 Condenser Of f Gas Removal 4.9 SP 23.124.01 Steam Sealing 4.10 SP 23.103.01 Condensate 4.11 SP 23.109.01 Feedwater System 4.12 SP 23.709.01 Reactor Water Cleanup System l
1 l
i SP 29.023.05 Rev. F
/- /
Page 5 of. 7
i P
- ===
I N
i
'/
w "P
l en.
%e
=w 56 ua t
a s.
f u
25 o-L g
l
~
Pressure suppression, li:d,c eowc..
S' O-O d.5 34'.5 l_
Prd-ry Cc::02#-: Ware: Leve2,(fc.)
1 j
I f/& )
59:nE F6 40/44 SE Avsanets sc.wW yrk gf4geatsn y>r Nd fon/'47C SP 29.023.05 Rev. F
'i
-/ /
Page 6 of 7 l
e eem
---+--w+-p,---pwy--gy-y e
as 9
.---g-g-,
r9 m.
w y.p p-#,yy.-9.w-wy.,--=,c,,g-g-=_.
-9 mm
_,+
.,.,,ee
.-n me
,,w+y---
i l
f i
1 i-l 550 N
es e oC c
ou-e e.
wa
-- u.u aw" RPV saturatica u o 3 " >a \\
timit
~
mue c
N
'o o o
@'u !
s euu n es u
-o.ce-.
212
+
0-RPV Pressure (psig)
.I0'00 i
t f/6.2 I
54mP'E I.
f/fy ill/ L t. 0 [ /7 vat f.A6L5 h//t'T'./ WW hl/MUNW~' NE I
i'
/d576 SP 29.023.05 Rev. F
}'
i
/ /
Page 7 of 7
[
!i.
I t
}
.,..