ML20052E805
| ML20052E805 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 05/06/1982 |
| From: | PORTLAND GENERAL ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML20052E785 | List: |
| References | |
| TAC-48390, NUDOCS 8205110438 | |
| Download: ML20052E805 (7) | |
Text
Attachment 1 CONTAINMENT SYSTEMS SURVEILLANCE RE0VIREMENTS (Continued) 4.6.3.1.2 Each isolation valve specified in Table 3.6-1 shall be demonstrated OPERABLE during the COLD SHUTDOWN or REFUELING MODE at least once per 18 months by:
a.
Verifying that on a containment isolation test signal, each isolation valve actuates to its isolation position.
b.
Verifying that on a Containment Ventilation isolation signal, each Containment purge and hydrogen vent supply and exhaust valve actuates to its isolation position.
c.
Verifying that upon a Containment High Radiation signal, each Containment purge and hydrogen vent supply and exhaust valve actuates to its isolation position.
4.6.3.1.3 The isolation time of each power operated or automatic valve of Table 3.6-1 shall be determined to be within its limits when tested pursuant to Specification 4.0.5.
4.6.3.1.4 Containment purge supply and exhaust valves shall be verified to be inoperable (electric power or air supplies removed from their respective operators) every 31 days wnile in Operating Modes 1 through 4 4.6.3.1.5 Prior to entering Mode 4 from a COLD SHUTDOWN condition, Containment purge supply and exhaust valves shall be verified OPERABLE, if valves have been cycled in Modes 5 or 6, by performing a leak rate test.
Leakage rate acceptance criteria will be such that when the measured leak-age rate is added to the leakage rates determined pursuant to Technical Specification 4.6.1.2.d for all other Type B and C penetrations, the com-bined leakage will be less than or equal to.60La. The leakage rate for the Containment purge supply and exhaust valves shall also be compared to their previously measured leakage rate to detect excessive valve degra-l dation. The Containment purge supply and exhaust valves shall not be l
cycled after final leak testing prior to entering Mode 4 from Mode 5.
l TROJ AN-UNIT 1 3/4 6-16 Amendment No. 28 May 4, 1978 8205110438 820506 PDR ADOCK 05000344 P
PDR 1
-j TABLE 3.6-1 8
];
CONTAINMENT ISOLATION VALVES e
'5 TESTABLE DURING H
VALVE NUMBER FUNCTION PLANT OPERATION ISOLATION TIME
~
(seconds)
A.
Containment Isolation MO 5676 Containment atmosphere sample return - outside yes 10 MO 5671 Containment atmosphere sample supply - outside yes 10 MO 5673 Containment atmosphere sample i
return - inside yes 10 MO 5663 Containment atmosphere sample
$d return - outside yes 10 CV 8026 Pressurizer relief tank gas
?'
analyzer - inside yes 10 5;
CV 8025 Pressurizer relief tank gas analyzer - outside yes 10 MO 5660 RCDT gas analyzer - inside yes 10 CV 5661 RCDT gas analyzer - outside yes 10 CV 4000 RCDT N2 supply - outside yes 10 MO 4005 RCDT discharge - inside yes 10 CV 4006 RCDT discharge - outside yes 10 CV 8028 Pressurizer relief tank makeup - outside yes 10 MO 5677 Containment atmosphere sample supply - outside yes 10 i
MO 5678 Containment atmosphere sample return - outside yes 10 l
4
~
E
/
/
4
TABLE 3.6-1
- g CONTAINMENT ISOLATION VALVES 8a TESTABLE DURING VALVE NUMBER FUNCTION PLANT OPERATION ISOLATION TIME f5 (seconds)
-4 A;
Containment Isolation CV 8033 Pressurizer relief tank N supply - outside yes 10 2
CV 8880 Accumulator N supply - outside yes 10 2
M0 4300 Gas collection header - inside yes 10 CV 4301 Gas collection header - outside yes 10 MO 10016 Chilled water supply - inside yes 5
CV 10015 Chilled water supply - outside yes 3
MO 10013 Chilled water return - inside yes 5
tY 10014 Chilled water return - outside yes 3
,,);
M0 4180 Containment sump discharge -
inside yes 10 j,
CV 4181 Containment sump discharge -
e outside yes 10 CV 8871 SIS test line - inside yes 10 CV 8964 SIS test line - outside yes 10 CV 8888 SIS test line - outside yes 10 CV 8149A CVCS letdown - inside yes 10 CV 8149B CVCS letdown - inside yes 10 CV 8149C CVCS letdown - inside yes 10 CV 8152 CVCS letdown - outside yes 10 MO 8112 RC Pump seal water return -
inside no 10 MO 8100 RC Pump seal water return -
outside no 10 SV 5642 Containment atmosphere sample supply drain - inside yes 3
SV 5643 Containment atmosphere sample supply drain - inside yes 3
SV 5679 Containment atmosphere sample return - inside yes 3
~.
TABLE 3.6-1 g
CONTAINMENT ISOLATION VALVES EE TESTABLE DURING Ci YALVE NUMBER FUNCTION PLANT OPERATION IS01.ATION TIME (seconds)
A.
Containment Isolation M0 8105!
CVCS ~ charging - outside yes N.A.
M0 8106#
CVCS charging - outside yes N.A CV 4470 Service air supply - outside yes 10 CV 4471 Instrument air supply - outside no 10 M0 3291#
CCW train "A" supply - outside no N.A.
M0 3292#
CCW train "A" discharge - outside no N.A.
MO 3346#
CCW train "B" supply - outside no N.A.
M0 3290#
CCW train "B" discharge - outside no N.A.
os B.
Containment Ventilation Isolation lo MO 10002**
Containment purge supply - inside yes 5
CV 10001**
Containment purge supply - outside yes 3
MO 10003**
Containment purge exhaust - inside yes 5
CV 10004**
Containment purge exhaust - outside yes 3
MO 10005***
Hydrogen vent supply - outside yes 5
MO 10006***
Hydrogen vent supply - outside yes 5
MO 10011***
Hydrogen vent exhaust - outside yes 5
MO 10012***
Hydrogen vent exhaust - outside yes 5
MO 10007***
Hydrogen vent supply - inside yes 5
M0 10008***
Hydrogen vent supply - inside yes 5
MO 10009***
Hydrogen vent exhaust - inside yes 5
M0 10010***
Hydrogen vent exhaust - inside yes
-5 l
- j TABLE 3.6-1 E3 g;
CONTAINMENT ISOLATION VALVES TESTABLE DURING
-1 VALVE NUMBER FUNCTION PLANT OPERATION ISOLATION TIME (seconds)
F. - Manual Valves Continued FWO79#-FWO86#
Feedwater Line Drains no N.A.
MS013#-MS016#*
Main Steam Line Drains no N.A.
G.
Check Valves 8047 PRT N Supply - inside no N.A.
2 8046 PMU Water to Press.
4d Relief Tank - inside no N.A.
8180 RCP Seal Water Rrn. - inside no N.A.
]
8968 N to Accumulators - inside no N.A.
2 Check valve Demin. Water to Washdown Sta. - inside no N.A.
Check valve RCDT N Supply - inside no N.A.
2 Check valve downstream of CV 4470 Service Air - inside no N.A.
Check valve downstream Instrument Air - inside no N.A.
of CV 4471 NN 1!a m o.
May be opened on an intermittent basis under administrative control.
G5
- The Containment purge supply and exhaust valves shall be made inoperable (electric power or air supplies removed from their respective operators) during Modes 1 through 4.
z GP
- The Hydrogen vent supply and exhaust valves shall be normally closed, and opened only when and for the oi os duration of time actually necessary.
Not subject to Type C. leakage tests.
CONTAINMENT SYSTEMS HYDROGEN MIXING SYSTEM LIMITING CONDITION FOR OPERATION 3.6.4.4 Two independent hydrogen mixing systems shall be OPERABLE.
APPLICABILITY: MODES 1 and 2.
ACTION:
With one hydrogen mixing system inoperable, restore the inoperable system to OPERABLE status within 30 days or be in HOT STANDBY within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
SURVEILLANCE REQUIREMENTS 4.6.4.4 Each hydrogen mixing system shall be demonstrated OPERABLE:
a.
At least once per 92 days on a STAGGERED TEST BASIS by:
1.
Verifying that the system can be started on operator action in the control room, and 2.
Verifying that the system operates for at least 15 minutes.
b.
At least once per 18 months by verifying a system flow rate of 2500 cfm i 10%.
TROJAN-UNIT 1 3/4 6-30
i,.
CONTAINMENT SYSTEMS BASES 3/4.6.3 CONTAINMENT ISOLATION VALVES The OPERABILITY of the containment isolation valves ensures that the containment atmosphere will be isolated from the outside environment in the event of a release of radioactive material to the containment atmosphere or pressurization of the containment. Containment isolation within the time limits specified ensures that the release of radioactive material to the environment will be consistent with the assumptions used in the analyses for a LOCA.
The containment purge supply and exhaust valves are maintained shut with their power supplies removed during Operating Modes 1-4, since they have not been qualified under Design Basis Accident LOCA conditions.
Because the Plant is in an inherently safer condition with containment ventilation valves shut, hydrogen vent supply and exhaust valves are normally shut and opened only when and for the duration of time actually necessary.
The containment purge supply and exhaust valves have resilient seat material which may be subject to leakage past the seats. For this reason leak testing on these valves is performed prior to entering Mode 4 from Mode 5, provided the purge valves had been cycled while in Modes 5 or 6.
3/4.6.4 COMBUSTIBLE GAS CONTROL The OPERABILITY of the equipment and systems reouired for the detec-tion and control of hydrogen gas ensures that this equipment will be available to maintain the hydrogen concentration within containn.ent below its flammable limit during post-LOCA conditions. Either recombiner unit or the purge system is capable of controlling the expected hydrogen generation associated with 1) zirconium-water reactions, 2) radiolytic decomposition of water and 3) corrosion of metals within containment.
These hydrogen control systems are consistent with the recommendations of Regulatory Guide 1.7, " Control of Combustible Gas Concentrations in Containment Following a LOCA," March 1971.
The hydrogen mixing systems are provided to ensure adequate mixing of the containment atmosphere following a LOCA. This mixing action will prevent localized accumulations of hydrogen from exceeding the flammable limit.
TROJAN-UNIT 1 B 3/4 6-4
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