ML19224B099
| ML19224B099 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 09/29/1978 |
| From: | Metropolitan Edison Co |
| To: | Mullinix W NRC/IE |
| References | |
| TASK-TF, TASK-TMR 2202-1.5, TM-0033, TM-33, NUDOCS 7906140045 | |
| Download: ML19224B099 (12) | |
Text
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DOCUMENT NO:
COPY MADE ON
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OF DOCMENT PROVIDED BY
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METROPOLITAti EDISON COMPANY.
Wilda R. Mullinix,.NRC 7906140045 186 261 5
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2202-1.5
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09/29/78
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THREE MILE ISLAND NUCLE AR STATION I
UNIT #2 EMERGE?:CY PROCEDURE 2202-1.5 PRESSURIZER SYSTEM FAILURE Table of Effective Pages Page Date Revision Page Date Revision Page Date devi.on 1.0 C6/22/77 1
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27.0 52.0 3.0 C6/22/77 1
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29.0 54.
5.0 09/29/78 3
30.0 55.0 6.0 03/11/77 0
31.0 56.0 7.0 03/11/77 0
32.0 57.0 8.0 03/11/77 0
33.0 58.0 9.0 03/11/77 0
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Approval
/2 Date C gnizant Dept. Head Ccgnizant Dept. Head Unit 1 PORC Recommends Approval Unit 2 PORC Recommends Aoproval YY r U~ !6J Date k
Date Chairman of PORC
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Chairman of PORC
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Unit 1 Superintendent Approval Unit 2 Superintendent Approval
/?h Yjl n dl Date 9' 7/ D Date Y
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Manager Generation Quality Assurance Approval
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.a 2202-1.5 Revisicn 1
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06/22/77 AFA 2 a '919
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THREE MILE ISLAND NUCLEAR STATICN UNIT #2 EMERGENCY PROCEDURE 2202-1.5 PRESSURIZER SYSTEM FAILURE SECTION A Lef_Finc Pilot Goerated (electrcmatic) Relief Valve (RC-R2)
A.1 SYMPTCMS 1.
Relief valve discharge line temperature exceeding the normal 130 F.
Alarms on ccmputer at 200 F.
2.
RC drain tank pressure above normal on the control rocm radwaste disposal control panel and temperature above normal on the local radwaste disposal control panel.
3.
RC System makeup flow above normal for the variable letdown ficw and RC pump seal in-leakage conditions.
4.
Soric Acid concentration continually increasing in the pressurizer.
A.2 IMMEDIATE ACTIONS A.
Automatic Actions 1.
None.
B.
Manual Actions 1.
Close the Electrcmatic Relief Isolation Valve, RC-V2.
A.3 FOLLOW-UP ACTION 1.
Repair during next shutdown.
2.
Limit rate of change on ICS to less than 1% per minute while RCV is closed except for runbacks.
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2202-1.5 Arn
- 379 Revision 1
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06/22/77 SECTION B Inocerative Pilot ccerated (electromatic) Relief Valve (RC-R2)
B.1 SYMPTCMS 1.
RC System pressure is above 2255 psig and RC-R2 fails to open.
2.
RC System pressure is belcw 2205 psig and RC-R2 fails to close.
3.
RC-R2 discharge line temperature is above the 200 F alarm.
Ccmputer Point (402) 4.
The RC drain tank pressure and temperature are above normal on the control room radwaste disposal control panel 8A.
B.2 IMMEDIATE ACTION A.
Autcmatic Action 1.
For a failed closed RC-R2:
a.
Pressurizer heaters off at 2160 psig.
Spray valve RC-VI is open above 2205 psig.
b.
Reactor trip occurs at 2355 psig.
c.
Pressurizer code relief valves open at 2450 psig.
2.
For a failed open RC-R2:
a.
All pressurizer heater banks on full belcw 2105 psig.
b.
Reactor trips at 1900 psig or variable pressure temperature.
c.
High Pressure Injecticn is actuated at 1600 psig.
B.
Manual Action a
1.
For a failed close RC-R2:
}
a.
Shift spray valve RC-V1 to " MANUAL" and open further for additional spray ficw.
b.
Insure all pressurizer heaters off above 21c0 psig.
186 264 2.0
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! 1 APE 2 2 GI9 2202-1.5 Revision 1 06/22/77 c.
If reactor pcwer is being changed (except for a runback) stop the power change until pressure is returned to normal.
d.
Isolate RC-R2 by closing RC-V2.
l 2.
For a failed cpen RC-R2:
a.
Close Electrcmatic Relief Isolation Valve (RC-V2).
h.
Insure all pressurizer heaters on belcw 2105 psig.
B.3 FOLLOW-UP AClIO.'l 1.
Return system pressure z.nd temoerature to normal.
2.
Reduce ICS Rate of Char.ge to less than 1% per minute (except for Runbacks.)
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2202-1.5
'A Revision 2 APR N IN 11/17/77 SECTION C Leakina Code Relief Valve (RC-RlA or RC-RlB)
C.1 SYMPTOMS 1.
Code relief valve discharge line temperature (s) exceeding the U
computer normal 130 F.
Computer alarms at 200 F. Computer Point ',403) (404) 2.
RC drain tank pressure and temperature above normal on the control rocm radwaste disposal control par.el 8A.
3.
RC System makeup flow is above normal for the variable letdown flow and RC pump seal in-leakage conditions.
d Bc ric Acid Concentration continually increasing in the Pressurizer.
C.2 IMN DIATE ACTION A.
Automatic Action 1.
None.
B.
Manual Action 1.
Determine RC leakage according to 2301-3D3.
C. 3 FOLLOW-UP ACTION 1.
If RC syste:a identified leakage is in excess of 10 gpa, reduce the leakage rate to within limits within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> or be in HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and COLD SHUTUOWN within the followino 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
2.
It will be necessary to recirculate the pressurizer through the spray valve to equalize Boron concentration.
3.
Place Code relief Discharge Line temperatures on Analog Trend Recorder.
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T 2202-1.5 Revision 3 09/29/78 APR E 3 lug,
SECTION D Inocerative Ccde Relief Valve (RC-Rl A or RC-RlB)
D.1 SYMPTCMS 1.
Code relief valve (s) fail to open when RC pressure is above 2450 psig.
2.
Code relief valve (s) fail to close when RC pressure is below 2325 psig.
3.
Code relief valve (s) discharge line temperature is above 200 F alarm.
4.
The RC Drain Tank pressure and temperature are above r.ormal on the control room radwaste disposal control panel.
5.
RC system makeup floa is above normal for the variable letdown ficw and the RC puro seal in-leakage conditions.
D. 2 IMMEDIATE ACTION A.
Automatic Action 1.
For a fail to open code relief valve:
a.
Reactor trip o: curred at 2355 psig.
b.
Spray valve RC-V1 opened above 2205 ps:g-.
2.
For a fail to close code relief valve:
a.
Reactor trip o: curs at 19C0 psig or on variable F/T.
b.
Increased makeup flow.
c.
All pressurizer heaters energized.
d.
Safety Injection is a-tuated at 1600 psig.
B.
Manual Action 1.
For a fail to open code relief valve:
a.
Place pressurizer spray valve in " MANUAL" and open l
further for additional spray flow.
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2202-1.5 PA 2 3 1319 Revision 0 03/11/77 t.
Verify pressurizer heaters are "CFF" at plant control panel.
2.
For a fail to close code relief valve:
a.
Turn all heaters "CN" at plant control panel.
b.
Isolate letdown flow at plant control panel by
" CLOSING" MU-V376.
c.
Open CH-VSA. Start MU-PlA if neces s a ry.
Attempt to control pressurizer level using MU-V168.
d.
Manually initiate safety injection if r equired to maintain pressurizer level.
D.3 FOLLCW-UP ACTION 1.
For a fail to open code relief valve:
a.
Proceed with cooldown.
2.
For a fail to close code relief valve:
a.
Hold pressurizer, if possible, at or greater than 220 inches with Safety Injection.
b.
Proceed with cooldown.
c.
With no pressurizer code safety valve operable, immediately suspend all operations involving positive reactivity changes and place an operable CHR Loop into operation in the shutdown cooling mode.
d.
With a pressurizer code safety valve inoperable, either:
1.
Resttre the inoperable valve to coerable status wi+.hin 15 minutes or
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s 2.
Se in f ot Shutdown within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
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2202-1.5 APR 2 3 on Revision 0 03/11/77 SECTION E Inocerative Pressurizer Heaters E.1 SYMPTCMS 1.
Heater banks fail to energize or de-energize if RC pressure is at heater bank setpoint.
Bank 1 Sank 2 Bank 3 Bank 4 Bank 5 Units ON 2150 2145 2135 2120 2105 PSIG OFF 2160 2155 2155 2140 2125 P5!C NOTE:
Sanks 1,
2, and 3 are full on at "CN' setooint.
2.
Pressurizer level Lo-Lo alarm at 80 inches.
3.
Pressurizer heater pcwer supply ground alarm.
4 Abnormal console indicating lights for the heating groups.
5.
High (2255 psig) or low (2055 psig) pressure alarms.
E.2 IMMEDIATE ACTION A.
Automatic Action 1.
For energized heaters and rising pressure:
Pressurizer spray valve (RC-Vll open (r?d and green a.
console jag button lights).
2.
For loss of heaters and decreasing pressure: Ncne.
B.
Manual Action 1.
If control malfunction is suspected:
a.
Place heater controller in " MANUAL".
2.
For energized heaters and rising pressure:
a.
Attempt to de-energize all heaters except Banks 1 or 2.
(Groups 12 or 13 respecti*.elyl.
3.
For loss of heaters and decreasing pressures:
a.
Attempt to energize backuo heaters from plant control panel.
b.
If a. is unsuccessful, begin reducing unit load.
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2202-1.5-Revision 0 t#R 2 :' On 03/11/77 E.3
,1LLCW-UP ACTION 1.
For energized heaters and rising pressure:
a.
Open heater breakers in question at the prc.;urizer heater control centers except for Sanks 1 or 2 (Groups 12 or 13 respectively).
b.
Control RC pressure at the normal 2155 psig set point with the pressurizer spray valve (RC-V1) in " MANUAL".
2.
For loss of heaters :rd decreasing pressure:
a.
Determine cause.
b.
If pressure cannot be maintained with the remaining heaters, continue load reduction to shutdcwn and cossibly cooldcwn condition.
c.
Close RC-V3 and reopen periodically to maintain spray 0
line temcerature greater than 540 F.
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2202-1.5 APR 2 3 In3 ~
Revision 0 03/11/77
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SECTION F Malfunction In Pressurizer Level Incication or Control, F.1 SYMPTCMS 1.
Disagreement between the console reccrder leval readouts of more than 12 inches.
2.
Rapid change in indicated / recorded level due to loss of compensation or loss of power or d/p cell failure or other malfunction.
F.2 IMMEDIATE ACTION A.
Automatic Act1;on 1.
If indication fails low:
Pressurizer ' aaters trip 9 30 inches, makeup valve MU-V17 opens, and pressure increases.
2.
If indication fails high:
Makeup valve MU-V17 closes.
B.
Manual Action 1.
When any two of three console recorder level transmitter readouts disagree by more than 12 inches, take manual control of level and then select the third transmitter for indication.
2.
Re-energize heaters if tripoed due to malfunction.
F.3 FOLLCW-L'P ACTION 1.
If the switching level transmitters has not rectified the c o n di ti u,1, switch to the alternate temperature detector.
2.
If pressurizer level recorder indication is lost, select another transmitter or use the ccmputer for level indication.
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2202-1.5 tJR 2 3 1373 :
Revision 0 03/11/77 SECTION G Pressurizer Soray Valve Failure (RC-V1)
G.1 SYMPTCMS 1.
Pressurizer spray valve (RC-V1) fails to open when the RC system pressure is greater than 2205 psig.
2.
Pressurizer spray valve (RC-VI) is open when the RC System is less than 2155 psig.
G.2 :MMEDIATE ACTION A.
Automatic Action 1.
RC system pressure gre.ter than ?255 psig activates RC-R2 electromatic relief 2nd the high pressure alarm.
2.
RC-V1 failing cpen (in auto) causes RC system pressure to stablize at approximately 2100 psig with all heater "on".
3.
Failure when manually opened beyond the automatiz limit nosition causes continued pressure drop and alarm at 2055.
B.
Manual Action 1.
Control RC-V1 opening or closing in " MANUAL" with jog buttons.
2.
If the spray valve has failed coen, control pressure by closing the pressurizer spray isolation valve (RC-V31 NOTE:
If the pressurizer spray isolation valve (RC-Y3) 15 closed, it must be periodic
~y cycled to keep the spray line warm.
Cycle RC-V3 is acen as necessary to stay above RC pressurizer spray line temperature alarm of E40 F.
(Compu ter point 04051 10.0 jUf }77 R
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2202-1.5-A h 2 3 n+9 Revision 0 03/11/77 CAUTION: Do not exeed a AT of 410 '
' ween pressurizer temcerature and reactor coolant hot 'eg temoerature.
3.
Reduce rate of ICS lead change to less than 1% per c.inute.
G.3 FOLLCN-UP ACTION 1.
Continue plant operation with reduced rate of load changa.
2.
Check thermal overicad :n RC-VI and reset if necessary.
4, 1
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