ML19330B716
| ML19330B716 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 07/25/1980 |
| From: | ALABAMA POWER CO. |
| To: | |
| Shared Package | |
| ML19330B712 | List: |
| References | |
| FNP-2-AOP-25.0, NUDOCS 8008050417 | |
| Download: ML19330B716 (7) | |
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VOLUMS 5 FWP-2-AOP-25.0 i
Ot:1y 25, 1980 t
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i rf FAPJ.3Y NUCLEAR PLANT I'r ABNORMAL OPERAMNG PROCEDURE
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i VOLUME 5 FNP-2-AOP-25.0 l
7 FARLEY NUCLEAR Pl>.HT f
UNIT 2 ABNORMAL OPERAT1HG PROCEDURE ACP-25.0 l
CONDDISER LEAKAGE 1.0 Purnose
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t To provide the symptoms, automatic actions, immediate i
operator act. ions, and subsequent operator actions for t
a condenser leak which allows circulating water to enter the condensate system.
i 2.O Symptoms l,
i I 2.1 The Shift Foreman has been notified by the Chemistry Group that a possible condenser tube
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leak exists.
i1 2.2 indication of increasing Cation conductivities
'l with possible high water analysis alarm on the
!l following conductivity recorders:
i 2.2.1 N2P15SR4023A - Steam Generator' Inlet I
(Feedwater) Cation Conductivity.
2.2.2 H2P15SR40233 - Steam Generator Outlet 5
Cation Conductivity.
{i 2.2.3 N2P15SR4024A - Condenser Hotwell A Cation Conductivity.
j 2.2.4 H2P15SR40243 - Condenser Hotwell B Cation Conductivity.
3.0 Automatic Actions I
f Hone i
4.0 Imnediate Operator Actions
' I G.1 Determine if an actual condenser tube leak
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exists by referring to recorded parameters in the Control Room (CR) and Sample Room (SR).
j 4.1.1 Cation conductivity - The most rapid indication of a condenser leak.
Increasing l
conductivity would be expected on the condensate (CR), the feedwater (CR) and steam generator blov4own (SR).
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o VOLUM5 5 FNP-2-AOP-25.0 i
4.1.2 PH - (SR) wi13 show a measurable increase if the leak is very large but thin effect may not be observable on small leaks.
4.2 Request a confirning chemical analysis on steam generator blowdown chlorides.
4.2.1 Thit analysis should be used to confirm cation conductivity indications of a leak.
5.0 Subsequent Operator Actions NOTE: Reduce power to the level necessary to allow actions specified in following paragraphs to be completed.
5.1 If the FI:EDWATER AND SGBD cation conductivity remains < 2 pahos/cs.
5.1.1 Reduce power to 600MW HOTE:
Power reduction can be delayed, I-~
for a period not to siceed ~24 hours, to meet load demands.
5.1.2 Determine, from the chemistry data, which half of the condenser contains the leak.
l 5.1.3 Select a water box in the affected con-denser half, and close the circulating Water inlet and outlet valves, and open j
the vent and drain.
i 5.1.4 Observe condensate cation conductivity and fluctuations in vacuum for evidence of leak being uncovered.
i NOTE:
When power is reduced, the catio.n conductivity will rise because actual concentration of contaminants Will increase as a result of decreased con-i densate/ steam flow.
When the water level in the water box is drained below the leaking tube, the inflow of contaminated i
water will stop and the cation l
conductivity will go down.
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D VOLUME 5 Fl&-2-AOP-25.0
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t Ia 5.1.5 Open water box as soon as possible 14 during draining.
ir 5.1.5.1 Listen for any sound changes (F
which night indicate location P
of leak.
F# l p-5.1.6 If leak is not found return water box
- L and circulating water system to that 3
condenser half to operation per SOP-26.0, L=,
5.1.7 Repeat steps 5.1.3 to 5.1.6 until leaking fl.
tubes are found, and defective tubes are R
plugged.
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71 5.1.8 When repair is completed return to J:c desired power level.
Maintain 3GBD at fi maxiraum rate until chemistry indicates 9
S/G's are clean, b
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5.2 3 f the FEEDWATER OJ SCED cation conductivity > 2 y/,;
pmhos/cm and < 7 pmhos/cm kW
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5.2.1 Commence an orderly power reduction to N
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600MW.
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5.2.2 1solate condensate dump to condensate h')
storage tank, 5.2.3 If necessary to reduce Hotwell Level, h'
open condensate drains.
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5.2.4 Locate and repair leaking tubes per y@
p steps 5.1.2 through L.1.7.
5.2.5 When repairs are completed per-form one d'
of the following:
K Ts:
5.2.5.1 With FEEDWATER AND SGBD cation conductivity 5, 7 pmhos/cm S,
return to rated power.
Mkintain a;i SGBD at maximum rate until
{yJi chemistry indicates S/G's are clean.
P.
91 5.2.5.2 With FEEDWATER OR SCED Cation El conductivity > Tpmhos/cm.
g; n.
Place unit in hot standby r
b.
Perf orn steps 5.3.5 through fifI 5.3.10 b
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Maintain SOBD at maximum rate, and condensate dump to CST isolated until notified by Chemistry Group.
5.3 3 f the FEEDWATER OR SCED cation conductivity > 7 pmhos/cm 5.3.1 Co:cmence shutdown to hot standby at the roaximum rate (Be in hot standby within 30 min.)
5.3.2 1solate condensate dump to condensate storage tank.
5.3.3 Isolate main feedwater and transfer to auxiliary feedwater.
5.3.4 Locate and repair leaking tubes per steps 5.1.2 through 5.1.7.
0 5.3.5 Cooldown to Tave i S40 F 5.3.6 Close MSlV's and break condens,er vacuum.
5.3.7 When condensate and feedwater are <
2000F drain hotwell, condensate, and reedwater Systems.
5.3.8 Flush condensate and Feedwater Systems per Chemistry Group instructions.
5.3.9 When condenser cation conductivity is <
0.5 pmhos/cm restore systems to normal
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per SOP-21.0 5.3.10 Determine from the Chemistry Group, the desired course of action, and steam generator endpoint chemistry parameters, and proceed as directed.
5.3.10.1 If steam generators are not to be drained, flushing should l
continue until cation conduct-1vity is i 7'pmhos/cm ahd chlorides are 10.5 PPM.
5.3.10.2 Proceeding to cold shutdowrr and rinsing steam generator tubes r.hould be considered if ll the following parameters are
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cxceeded (SCBD).
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