ML17299A340
| ML17299A340 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 06/05/1985 |
| From: | ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | |
| Shared Package | |
| ML17299A337 | List: |
| References | |
| NUDOCS 8506100581 | |
| Download: ML17299A340 (46) | |
Text
RESULTS OF LKQ(AGE MONITORING OF SYSTEMS OUTSIDE CONTAINMENT WHICH COULD,CONTAIN RADIOACTIVE FLUIDS FOL'LOWING AN ACCIDENT PALO VERDE NUCLEAR GENERATING STATION UNIT 1 JUNE 5, 1985 850bf00581 850bPb28 PDR ADOCK 050005 P
t I
'j t
I.
SUMMARY
The objective of.the leakage monitoring program is to locate and minimize leakage from those portions of the Safety Injection System and the Post-Accident Sampling System which could contain highly radioactive fluids during a serious transient or accident.
This testing ensures that leakage from these systems are maintained to as low as practical levels.
The leakage monitoring tests are performed on a schedule of at least once per refueling cycle in order to meet the requirements of PVNGS Unit 1 Technical Specification 6.8.4.a and NUREG-0737 item III.D.l.l.
The leakage monitoring tests were performed on those portions of the Safety Injection System and the Post-Accident Sampling System outside containment which are likely to contain radioactive fluids following an accident.
It should be noted that only those portions of the Post-Accident Sampling System that are currently being used at PVNGS Unit 1
are included in. this leakage testing.
The in-line Post-Accident Sampling System Capability will not be installed and operational until after the first refueling outage for Unit 1.
These additional portions of the Post-Accident Sampling System will be included in the leakage monitoring program after the first refueling outage.
The detailed results of these leakage tests are presented in Section III of this report.
The overall estimated leakage from these systems are as follows:
Estimated Leaks e (
m) 1.
High Pressure Safety Injection Train A Train B 0.02697 0.00477 2.
Low Pressure Safety Injection Train A Train B 0.00021 0.0 0173K/0010K
Estimated Leaka e (
m) 3.
Containment Spray System Train A Train 3 0.00035 0.00317 4.
Reactor Coolant Sample (PASS) 0.0 5.
Safety Injection Sampling (PASS) 0.0 6.
Containment Radwaste Sump Sampling (PASS) 0.0 II.
TEST DISCUSSION This test is designed to identify and correct any leakages from the applicable portions of the Safety Injection System and the Post-Accident Sampling System.
This test consists of having an inspector walkdown the piping systems during system operation to identify any leakage from the potential leakage paths (i.e.,
- valves, fittings, 'eals, etc.).
The inspector can be accompanied by a plant mechanic during the performance of this test.
This allows for the plant mechanic to adjust the packing on any manual valves where leakage is identified during the performance of the test.
If any identified leakage cannot be corrected during the performance of the test, the inspection team can issue a work request per Station Manual Procedure 30AC-9ZZOl ("Work Control").
This identified leakage will then be corrected as soon as
. possible following the inspection.
Certain portions of the Safety Injection System are not pressurized during the performance of this test due to the lack of isolation valves between the Safety Injection System and the Reactor Coolant System.
- However, these components have been pressurized in the past and these components are inspected during this test to determine if the components show any signs of previous leakage.
If signs of previous leakage exist, corrective maintenance will be performed to correct the leakage.
III'ESULTS Th'e set of Tables presented in this section of this report summarize the inspection results'nd the identified leakage from the outside containment portions of the Safety Injection System and the Post-Accident Sampling System.
The following codes are used in the Tables to identify the location of the leak and the estimated leakage rates.
Location of Leak:
P Packing/stem leak DC Drain cap leak VC Vent cap leak 0
~ Other type of leak Leakage Estimates:
A No leak B
Small leak where boron crystals are visible but have not overflowed onto the floor or other equipment (estimated leakage of less than 1 drop per day)
C
~ Small leak where boron crystals are visible and there is visible overflow onto the floor or other equipment that has dried (estimated leakage of less than 6
drops per day)
D
= Small leak where boron crystals are visible and there is visible overflow onto the floor or other equipment that is wet in appearance (estimated leakage of less than 1 drop per 30 minutes)
E Visible leakage where an actual estimate can be made of the leakage rate
HIGH PRESSURE SAFETY INJECTION TRAIN A Location of Leak Estimated
~Leaka e
F0-43, Flange, Flow Limiting Orifice F0-45, Flange, Flow Limiting Orifice UV-637, HPSI Header to Loop 1A V&33, HPSI Header to Loop 1B Vent UV&47, HPSI Header to Loop 1B
,I HV-321, HP Long Term Recirc Ctmt Isolation
- V859 & Cap, HP Long Term Recirc Drain and Test
- V525, Ft 390 Root
%526, Ft 390 Root
- FE-390, Flange V037
& Cap, HPSI Header Vent PSV-417, HPSI Header Relief PSV-468, HP Long Term Recirc Header Relief V039
& Cap, HP Long Term Recirc Header Vent V811, HPSI Header to Charging
- V821, HP Long Term Recirc to Charging, Loop 1 V951
& Cap, HPSI Header Drain Valve V839
& Cap, HP Long Term Recirc Drain and Test
%207
& Flange, Test Connection
- V205, Sump to SI Pump Check Valve
- UV674, Ctmt Isolation Valve V828
& Cap, SI Suction Vent Valve V508, Charging Pump to HPSI Header V894 & Cap, Charging Pump to HPSI Drain V934
& Cap, Charging to HPSI Vent PSV-285, HPSI Recirc Relief UV-709, HPSI Recirc to PASS UV&60, Safety Injection Recirc to RWT Isol VC DC VC E = 1 drop/sec A
E ~ 1 drop/5 min A
I'
Location of Leak Estimated
~Leaka e
V-465, HPSI Recirc to Post Acc. Sample Cooler V848
& Cap, HPSI Header Drain V850 & Cap, HP Long Term Recirc Vent V851 & Cap, HP Long Term Recirc Drain V819
& Cap, HPSI Header Drain V306, SI Suction from RWT Check Valve V820 & Cap, HP Long Term Recirc Vent HV-531, Safety Injection Suction from RWT V105, Ctmt Spray Suction from Sump UV&64, Ctmt Spray Recirc to RWT UV&69, LPSI Recirc to RWT HV-683, LPSI Suction Isolation V068 & Cap, LPSI Recirc to RWT Vent V470, HPSI Suction Isolation V552 & Cap HPSI Suction Pressure Test V009 & Cap HPSI Suction F0-25, HPSI Recirc. Orifice V218, HPSI Mini Flow Orifice Bypass V424, HPSI Recirc to RWT Check Valve UV&66, HPSI Recirc to RWT Isolation V023
& Cap, HPSI Recirc to RWT Drain l
V028 & Cap,,HPSI Header Vent V032
& Cap, HPSI Header Drain HV-604, HP Long Term Recirc Isolation V404, HPSI Header Check Valve F0-23, Flange V476, HPSI Header Isolation HV-698, HPSI to Loops Isolation V416, HPSI Header Vent V966, Root Valve to PT-308 VC DC VC VC VC
Location of Leak Estimated
~Leaka e
HPSI Pump Balancing Line PT308
& Limiting Orifice HPSI Pump Casing V956 HPSI Pump Vent and Drains V955 HPSI Pump Drain HPSI Pump Inboard Seal HPSI Pump Outboard Seal HPSI Pump Cyclone Filter V046
& Cap, HPSI Header Drain F0-47, Flange, Flow Limiting Orifice F0-49, Flange, Flow Limiting Orifice UV&17, HPSI Header to Loop 2A V&24 & Cap, HPSI Header to Loop 2A Vent UV&27, HPSI Header to Loop 2B V66
& Cap, HPSI Header to Ioop 2B Vent Flanges Casing Juncture Gland P
A A/B E
Stream A
~
i4
HIGH PRESSURE SAFETY INJECTION TRAIN B Location of Leak Estimated
~Leaka e
V040, HPSI Header to Charging F0-44, Flange, Flow Limiting Orifice F0-46, Flange, Flow Limiting Orifice UV&36, HPSI Header to Loop 1A V834, HPSI Header Vent UV-646, HPSI Header to Loop 1B V837, HPSI Header Vent V042 & Cap, HPSI Header Vent V050
& Cap, HPSI Header Drain F0-48, Flange, Flow Limiting Orifice F0-50, Flange, Flow Limiting Orifice UV&26, HPSI Header to Loop 2B V&67, HPSI Header to Loop 2B Vent UV-616, HPSI Header to Loop 2A V&25, HPSI Header to Loop 2A Vent V045 & Cap, HP Long Term Recirc Vent HV-331, HP Long Term Recirc Isolation
- V871 & Cap, HP Long Term Recirc Test
%535, Ft 391 Root
- V536, Ft 391 Root
& Cap, HPSI Header Vent V952 & Cap, HPSI Header Drain Valve V832 & Cap, HP Long Term Recirc Drain and Test V829
& Cap, SI Suction Vent Valve
- UV676, Ctmt Sump Isolation
'%208
& Flange, Test Connection V206, SI Suction Flow Check VC VC VC No Cap VC DC VC A
E 1 drop/sec E = 1 drop/sec E = 1 drop/18 sec A
A A
A'.
Location of Leak Estimated
~Leaka e
V509, Charging Pump to HPSI Header PSV-286,,HPSI Return to RWT Relief UV&59, SI to RWT Isolation V427, SI to Pass Sampler Cooler UV-710, SI to Pass Xsolation HV-530, SI Suction from RWT V855
& Cap,, HPSI Header Drain V305, SI Suction from RWT Check Valve V853
& Cap, HP Long Term Recirc Drain V854 & Cap, HPSI Header Vent V852
& Cap, HP Long Term Recirc Vent V408
& Cap, HPSI Header Vent V104, Ctmt Spray Suction from Sump UV665, Ctmt Spray Recirc to RWT HV-692, LPSI Suction Isolation UV-668, LPSI Recirc to RWT HV&99, HPSI to RCS Loops Isolation V030 & Cap, HPSI Header Vent V031 & Cap, HPSI Header Drain HV-609, HPSI Header to HP Long Term Recirc V967, PT309 Root PT309
& Flow Limiting Orifice F0-24, Flange V478, HPSI Header Xsolation V405, HPSI Header Check Valve V219, MiniflowOrifice Bypass V426, HPSI Recirc Check Valve V400, HPSI Recirc Cross Connect UV&67, HPSI Recirc to RWT Isolation V024 & Cap, HPSI Recirc Drain V402, HPSX Suction Isolation V553 & Cap, HPSI Suction Press Test V011 & Cap, HPSI Suction Press Test P,
VC DC PC C'~l drop/5 min drop/5 sec drop/4 sec drop/sec drop/sec
\\'C
Location of Leak Estimated
~Leaka e
F0-26, Mini;Flow Orifice HPSI Pump Casing V-954, HPSI Pump Vent 6 Drains V-953 HPSI Pump Drain HPSI Pump Balancing Line HPSI Pump Inboard Seal HPSI Pump Outboard Seal HPSI Pump Cyclone Filter 0
A A/B
'A
"I t
V
C LOW PRESSURE SAFETY INJECTION TRAIN A Location of Leak Estimated
~1eaka e
V856
& Cap, SD Cooling/Fuel Pool Cooling Vent
- V256, SD Cooling/Fuel Pool Cooling Isolation
- V876 & Cap, Shutdown Cooling Suction Line Vent
- V419, SD Cooling/SD,Purification Isol.
- V429, SD Cooling to Pass Sample Cooler
PSV&39, LPSI Header Relief F0-39, Flange, Flow Limiting Orifice F0-41, Flange, Flow Limiting Orifice
%085
& Cap, LPSI Hdr Vent
& Test
+V872 & Cap, LPSI Hdr Test Connection V909
& Cap SD Cooling Line Loop'1
'F0-736, HPSI Orifice I
&835 HPSI Drain & Test VC VC A
A No Cap, VC D
- FE 331 and Flange
- V125, Ft 331 Root
- V126, Ft 331 Root
- FT 331 (Outside Room)
- V838 HPSI Drain & Test
- FE 341 and Flange
- V145, Ft 341 Root
- V146, Ft 341 Root
- FT 341 (Outside Room)
P P
A C
~
p
Location of Leak Estimated
~Leaka e
+FO 747, HPSI Orifice
- FO 746, HPSI Orifice V908
& Cap, LPSI Header Drain & Test UV-635, LPSI Header to Loop lA HV-691, Shutdown Cooling Warmup Valve UV-655, Shutdown Cooling Suction Ctmt Isolation V874 & Cap, LPSI Header Drain & Test UV-645, LPSI Header to Loop 1B HV-657, Shutdown Cooling to Ioop Isol.
V081, Shutdown Cooling Hdr Drain V421, Shutdown Purification Isol.
V088
& Cap, SDHX Bypass Vent V184, Ctmt Spray Suction to Loop Isol.
V018
& Cap, Ctmt Spray Suction Vent V201, LPSI Suction Check Valve V004
& Cap, Root Valve
& Press Test V550
& Cap, LPSI Suction Header Drain &
V005
& Cap, Root Valve
& Press Test V451, LPSI MiniflowRecirc Check Valve F0-19, LPSI MiniflowOrifice V840 & Cap, LPSI Flush Connection/Vent V434, LPSI Header Check Valve V435, LPSI Discharge Isolation I
V069
& Cap, LPSI Header Drain V433, PT306 Root Valve PT306
& Flow Orifice HV-306, SDHX,Bypass LPSI Pump Casing LPSI Pump Seal LPSI Pump Cyclone Filter Flanges DC P$
DC E
1 drop/5 sec A
J I(
LOW PRESSURE SAFETY INJECTION TRAIN B Location of Leak Estimated
~Leaka e
%870
& Cap, Vent Upstream UV656
<<V868 & Cap, Test Vlv Dnstrm UV625
- UV656, SDC Suction from RC Loop 82 V869
& Cap, Vent Dnstrm UV656 V442, Fuel Pool to SDC Suction
- V418, SDC Purification Return V886
& Cap, Vent Upstrm V418
- V445, Sample Isolation SDC Suction Hdr V440, Hi Side Root Ft 307 V441, Lo Side Root Ft 307 FE307, Flange FT307, (Outside Room)
- F0717, HPSI Orifice
~F0716, HPSI Orifice
- F0727, HPSI Orifice
- FE 311 and Flange
- V115, Ft 311 Root
- V116, Ft 311 Root
+Ft 311 (Outside Room)
+F0726, HPSI Orifice
<<FE 321 and Flange
+V135, Ft 321 Root
- V136, Ft 321 Root
- FT 321 (Outside Room)
%826
& Cap, HPSI Hdr Drain
- V830 & Cap, HPSI Hdr Drain
&827 & Cap, Test Valve Dnstrm UV615 V831
& Cap, Vent Upstream UV625 VC P,
A
C l
Location of Leak Estimated
~Leaka e
VC, P
a P
P~
VC No Cap, P
No Cap, P
VC, P VC VC LPSI Pump Casing LPSI Pump Cyclone Pilter LPSI Pump Seal UV625, LPSI Loop Isolation to RC Loop 2B V097
& Cap, Drain Upstream UV615 UV615, LPSI Loop Isolation to RC Loop 2A
- HV658, SDC HX82 Plow Control V814
& Cap, Drain Downstream of HV658
- V420, SDC Purif. Isolation V094
& Cap, High PT Vent Dnstrm HV307 V185, Suction Isolation from SDC Hdr V019
& Cap, Vent Upstream V185 V200, Suction Check Valve V555 & Cap, LPSI Pump Suction Drain V014
& Cap, LPSI Pump Inlet PI Root V015
& Cap, LPSI Pump Inlet PI Root P0-20, LPSI Recirc Orifice V448, LPSI Recirc to RWT Check Valve
- HV307, SDC HX82 Bypass Discharge Control V861 & Cap, LPSI Pump Discharge Vent V842 & Cap, LPSI Pump Discharge Hdr Vent V446, LPSI Discharge Hdr Check V447, LPSI Pump //2 Discharge V075
& Cap, Drain Dnstrm V447 V436, LPSI Pump
$/2 Discharge Press Root PT307
& Orifice, Discharge Press Transmitter D
/
CONTAINMENT SPRAY SYSTEM TRAIN A Location of Leak Estimated
~Ieaka e
V483, PT303X Root PT303X 6 Flow Orifice
- V262, SDHX Tube Side Drain
- V260, SDHX Tube Side Vent V807 6 Cap, LPSI Header Vent TE303X, Thermowell PSV-194, LPSI Header Relief HV-678, Ctmt Spray to SDHX HV&85, LPSI to SDHX HV-686, SDHX to Shutdown Cooling Hdr Isol.
PSV-161, SD Cooling Header Relief
V257, Analysis Pt. Isolation V817 6 Cap, Fuel Pool Cooling Vent V458, Fuel Pool Cooling Isol.
+PSV-289, CS Hdr Relief HV&88, CS Pump to Hdr Isolation V089 6 Cap, Ctmt Spray Header Vent HV-687, Shutdown Cooling to Containment Spray Isolation
- UV672, CS Flow Control Valve
%500, CS Header Test PT CS Pump Cyclone Filter V157, Ctmt Spray Suction Check Valve V130, Spray Chem Sto Tk to Ctmt Spray Check Valve
- V551, CS Pump Suction Test/Plush Conn V006 6 Cap, Ctmt Spray Pump Suction Test Conn.
VC~ P P
VC1 P
E 1 drop/3 sec A
t lr li
Location of Leak Estimated
~Leaka e
CS Pump Casing V007 & Cap, Ctmt Spray Pump Suction Test Conn.
V016
& Cap, Ctmt Spray Pump Discharge Test Conn.
C.S.
Pump Seal V070
& Cap, Ctmt Spray Discharge Drain
- FE338, Flange V174, Ctmt Spray Flow Transmitter Hi Side Root t here Cyclone C
Filter Lines Enter Seal V175, Ctmt Spray Flow Transmitter Lo Side Root
- FT338, Ctmt Spray Flow Transmitter FO-21 CS Recirc Orifice V486, Ctmt Spray Recirc to RWZ Check Valve V841 & Cap, Ctmt Spray Header Flush Conn.
V485, Ctmt Spray Header Flow Check V071 & Cap, Ctmt Spray Header Drain HV684, Ctmt Spray Pump Discharge Isol.
Manifold Bottom of Insulation DC B
B A
la li N
CONTAINMENT SPRAY SYSTEM TRAIN B Location of Leak Estimated
~Leaka e
- V266, SDC HX82 Tube Drain
- V096, SDC HX82 Inlet Valve
- V264, SDC HX82 Tube Vent TE303Y, Thermowell
- PSV191, Shutdown Cooling Outlet Relief HV679, Ctmt Spray Pump //2 Discharge Isol.
- HV694, SDC HX42 Inlet Isol.
- HV696, SDC HX//2 Discharge Isol.
- PSV193, SDC Discharge Relief
- V202, SDC Discharge Analysis Pt. Root V910
& Cap, SDC to Fuel Pool Cooling Vent
- V455, SDC to Fuel Pool Cooling Isol.
V090 & Cap, Vent Upstrm HV695
'%092
- UV671, CS Flow Control Valve
%501
- V158, CS Suet Check Valve V120, Spray Chem Sto Tk to CS Check Valve V554
& Cap, CS Pump Suction Test/Flush Conn V012
& Cap, CS Pump Suction Test Conn VC VC, P DC VC A
,B B
E ~ 2 drop/sec E
1 drop/sec I
Location of Leak.
Estimated
~Leaka e
V013
& Cap, CS Pump Suction Test Conn V073 & Cap, CS Discharge Drain
- V176, CS Flow Transmitter Hi Side Root
- V177, CS Flow Transmitter Lo Side Root Ft 348
- V487, CS Recirc to RWT Check Valve V843
& Cap, CS Spray Header Flush Conn
- HV689, CS Pump Discharge Isolation F0-22, CS Recirc Orifice CS Pump Casing CS Pump Seal CS Pump Cyclone Filter p
P~
VC Bottom of Insulation At Piping Input From Cyclone Filter NOTE:
~indicates those components which were inspected while they were in an unpressurized state.
REACTOR 'OOLANT SAMPLE (PASS )
Location of Leak Estimated
~Leaka e
SS-UV-200, RCS-C.I.V.
Pass CV-4 (EDT)
Pass HVH (EDT)
EDT Pass Bulkhead Fitting EDT Pipe to Tube Fitting
- SSV847, 1JSSNC02 Isol
- SSV209, EDT Isolation (EDT Pump Room)
Pass RDT HV-5 Pass RDT CV-5 Pass RDT SV-5 Pass RDT Bulkhead Fitting Pass RDT Pipe to Tube Fitting
- SSV848, 1JSSNC02 Isol CHUV715, Pass-Rdt C.I.V.
CHV085, Vent Valve at CHUV715 AV-26 Depressurized Grab Sampler Valve Depressurized Liquid Sample Septum HV-1 RCS Manual Isol AV-1 RCS Isol.
AV-6 Filter Flush F-1 Filter AV-7 Flush Isol AVW Cooler Inlet AV-9 Booster Pump Inlet Coolers Inlet/Outlet AV-12 PRGS Isol Supply AV-13 PRGS Bypass A
A A
/
e 0
Location of Leak Estimated
~Leaka e
AV-15 PRGS Isol Return AV-20 Dual 3-way RGS Transfer (At Module)
AV-16 Orifice Inlet AV-17 Orifice Bypass, SV-18 Depressurized Grab Sample Supply SV-19 Sample Recirc CV-19 Depressurized Grab Sample Return BPCV-19 Backpressure Regulator SSV850 (RGS) 1JSSNC02 Isolation SSV849 (RGS) 1JSSNC02 Isolation AV-20 RGS Transfer Valve Dual 3-Way AV-22 PRGS Sample Valve Dual 3-Way CV-21 N Check Valve 2
AV-23 Degas Valve Off Gas Sample Septum AV-24 Evacuation Isol CV-25 IA Check Valve A
A l
SAFETY INJECTION SAMPLING (PASS)
Location of Leak Estimated
~Leaka e
PASS SI-A AV-2 PASS SI-A HV-2 PASS SI-A Bulkhead Fitting PASS SI-A Pipe to Tube Fitting SSV840 1JSSNC02 Isol SSV080 Vent Valve at SIUV709 SIUV709 Pass Isol VC A
e l
t
CONTAINMENT RADWASTE SUMP SAMPLING (PASS )
Location of Leak Estimated
~Leaka e
Pass CRWS AV-3 Pass CRWS HV-3 Pass CRWS Bulkhead Fitting Pass CRWS Pipe to Tube Fitting SSV841 1JSSNC02 Isol RDUV407 Pass Isol RDV083 Vent Valve at RDUV407
IV.
CONCLUSIONS The results of this leakage monitoring testing are presented in Section III of this report.
The results indicate the estimated leakage from those portions of the Safety Injection System and the Post-Accident Sampling System outside containment that could contain radioactive fluids following an accident.
Corrective maintenance activities will be initiated to correct the identified leakage as soon as possible after the completion of the inspection.
The leakage inspection that was performed satisfies the requirements of Technical Specification 6.8.4.a for the first cycle of operation for PVNGS Unit 1 and satisfies the commitments that were made in response to NUREG-0737 item III.D.l.l.
(I hI
~
~