ML19224B293
| ML19224B293 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/30/1976 |
| From: | Metropolitan Edison Co |
| To: | Mullinix W NRC/IE |
| References | |
| TM-0303, TM-303, ZAR-760430, NUDOCS 7906140409 | |
| Download: ML19224B293 (10) | |
Text
.
~
ir THI DOCUMENTS DOCUMENT NO: / /N - /
//' d COPY MADE ON OF DOCUMENT PROVIDED BY
/
r i
METROPOLITAN EDISON COMPANY.
Wilda R. Mullinix, NILC 7906140403 9
. = =
198 036
'7 e
e
e FINA L
~
SYSTEM DESCRIPTION (Index No. 54)
L REACTOR BUILDING LEAK RATE TEST SYSTEM (B&R Dwg. No. 2517 Rev. 6)
JERSEY Cn M PCWER AND LIGHT CCMPANY THREE MILE ISLAND NUCLEAR STATION UNG AO. 2 Isuue Date April, 1976 s
Prepared by:
H.
Iskyan Burns and Roe, Inc.
TABLE OF CONTENTS FOR REACTOR BUILDING LEAK RATE TEST SYSTEM Section
~
Pace
1.0 INTRODUCTION
1 1.1 System Function s 1
1.2 Summary Description of System 1
1.3
System Design
2 2.0 DETAILED DESCRIPTICN OF SYSTEM 2
2.2 Instruments, Ocntrols, and Protective Devices 3
3.0 PRINCbPAL MODES OF OPERATION 4
3.1 Startup 4
3.2 Normal Operation 4
3.3 Shutdown 4
3.4 Special or Infrequent Operation 5
3.5 Emergency 5
4.0 HAZARDS AND FRECAUTIONS 5
198 038
APPENDIX
,~
TITLE TABLE NO.
Leak Rate Test After Cooler and Cyclone Separator 1
Leak Rate Test Air Dryer 2
Instrumentation and Controls 3
Panel Mounted Annunciators and; Computer Inputs 4
e e
4 198 039 3
.I
- /
1.0 INTRODUCTION
l.1 System Punctions The functions of the Reactor Building Test System is to:
a.
Pressurize the Reactor Building with compres xiair b.
Control Reactor Building pressurization and depressur-ination.
c.
Remove moisture from compressed air d.
Cool and clean the compressed air e.
Measure containment temperature, pressure, and humid ty (dewpoin';)
f.
Superimpose a known leakage rate on the containment The leak Rate Test System interfaces with Nuclear Services River Water (B &R Dwg. 2033) for cooling, and with the Reactor
~
Building Ventilation and Purge System
(. &R Dwg. 2041) for B
containment air distribution, recirculation, and exhaust.
The Keactor Building Containment is leak tested about every 3 years.
It is not within the scope of this System Description to describe the Leak Rate Test and its associated precautions.
1.2 Summary Description of System (Ref. to B&R Dwg. No. 2517 Rev. 6)
For the initial Leakage Test, two construction air compressors are used as the air source.
The discharge of the compressor is cooled by an afte.coc.s.
and separator which remove condensate and other material from the air.
The moisture and oil content is furth>r acu.
.6 by passing.
the compressed air through an
. Drp.t.
LR-V44 maintains a constant 90 psig back pressure on th e Ai r Dryer and compressors.
198 040
- i
~ ~ '
The air then passes throt:gh a removable spool pie 2,
through AH-V7 and AH-V80 into the Reactor Building containment.
The containment is cepressurized by opening Reactor Building Purge Valves AH-V80 and AH-V81, and controlling downstream pressure with AH-V82.
1.3 Svstem Desian Recuirements The Leak Rate Test System is capable of providing 6,000 SCFM of 100 psig air to the Reactor Building Containment.
The System is conventional Seisnic Class II.
The components meet ASME and UL Standards.
The System is capable of simulating a known leakage rate by bleeding off through a flow indicator.
2.0 DETAILED DESCRIPTION OF SYSTEM 2.1.1 Aftercooler and Cvelone Secarator LR-V-1 The aftercooler and cyclone moisture separator are between the air air ccmpressors and the air dryer.
Air temperature in the cooler is reduced by Nuclear Service River Water.
The cyclone separator
- r. educes other impurities.
The liquid from the aftercooler and cyclone separator is collecteed in trap LR-Ul The aftercooler, cyclone separator,and air dryer are located on the 280' level of the Diesel Building.
2.1.2 Air Drver, LR-O-1 The air dryer is downstream of the aftercooler-cyclone separator, and upsteam e
?ressure con
- valve, LR-V44.
The single chamber dryel
- divided into a Mechanical Separation and Desicant Section.
The Mechanical Separator distributes air, and preceipitates moisture and leaves microscopic particles to the condensate drain.
Air flow passes through 198 041 :
.)
the desicant tablets were additional moisture is removed.
When the depth of the bed drops below the dryer level sight glass, the vessel should be depressurized and desicant tablets added through the fill hatch.
Each desicant tablet retains its hardness and effectiveness until it is consumed by the captured moisture which forms on it and gradually melts away the tablet.
As the spent chemical is drained away with the moisture, new tablets are automatically moving down into the drying area.
'The collected liquid is automatically blowndown.
The frequency of the blowdown is adjustable from 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
2.1.3 Maior System Valves Air Drver Pressure Control Vrlve. LR-V44 This 4 inch, 150 psig. 100 F, carbon steel valve controls pressure to maintain 90 psig, in the Air Dryer.
The valve may also be operated manually with a handwheel.
The valve fails open upon loss of instrument air.
2.1.4 Reactor Buildina Pressurization /Depressurization Valves (AH-V80 and AH-V81), and Deoressuaization Control Valve (AH-V8 2)
These valves are discussed in Reactor Building Ventilation and Purge system Description (Index No. 35A).
2.2 Instruments, Controls, and Protective Devices Instrumentation is included in Table 3.
There are two sets of accurate pressure and flow indicators.
Twenty-four temperature elements and 10 dewcells are located within the Continament.
Deweells measure moisture by indicating the dewpoint temperature of the air.
After testing, the_ all test instruments are removed and stored.
They are calibrated before being installed for the next-test.
198 042,
i
.)
There are no alarms associated with this system.
The only automatic feature of the system is the operation of LR-V44 and the air dryer blowdown, both discussed in Section 2.2.
The System is protected by relief valve LR-Rll on the air dryer, set at 125 psig.
3.0 PRINCIPAL MODES OF OPERATION 3.1 Starrue Prior to starting the air compressor, the level of the air dryer descicant should be checked, system integrity verified, and cooling water flow to the aftercoolers in-itated.
After starting the compressors, the drain lines are blowdown, and the inlet valve to the Air Dryer opened.
When operating pressure, 100 psig, is reached, the air
~
dryer outlet valve,'LR-V43, 'is slowly opened and compressed air flows into the containment as required by the test procedure.
3.2 Normal Coeration The System and its associated air compressor operate as required by the test procedure.
As part of the test a know leakage rate is superimposed by bleeding. air at a gi~ven rate th. rough the flow-iHdicator. -.
3.3 Shutdown At the completion of this test, the containment is de-pressurized by' bleeding through AH-v80, AH-V81', End the pressure
~
a contYol'Vslv{ AH,V82 to the statidd 5ent.v'l'a the Reactor Building i
Purge System.
Instruments are removed and stored.
The aftercooler shell is drained.
The System is Purged with nitrogen and sealed.
198 043
.]
^3.4 Soecial or Infrecuent Ooeration Operation of the Leakage Rate System is a Special az.d Infrequent Operation.
System operation is discussed in Sections 3.1,
- 3. 2, and 3.3.
3.5 Emercency The Reactor Building Leak Rate System has no emergency function.
4.0 HAZARDS AND PRECAUTIONS Ccmpressed air is hazardous.
Before each Leak Rate test, the integrity of the system should be verified.
Ensure that 90 psig pressure is maintained at the Air Dryer.
N 198 044
_. E
TABLE 1
~
l Leak Rate Test Aftercooler and Cyclone Separator Identification LR-C -1 Number Installed 1
Manufacture Worthington Model No.
13 AP Rated Capacity, SCFM 6,000 Air Pressure Drop. psi 0.7 Maximum Operating Pressure, psig 125 Inlet Air Temperature, 'F 220 U
Outlet Air Temperature, F
105 Cooling Water Flow, gpm 98 Inlet Water Temperature, F_
95 Outlet Water Temperature, F
120 Water Pressure Drop, psi 2
Classification Code C
Ctality 4
Seismic II Cleanliness D
198 045 i
TABLE 2 Leak Rate Test Air Dryer g g4 Identification LR-Q-1 Number Installed 1
Manufacture van Air Model No.
Dll4 Rated Capacity, SCFM at 100 psi C,635 Maximum Operating Pressure, psig 125 Air Pressure Drop, % of Operating Pressure 1
Desicant Dry 'te 455
/4CM d65 iCawmemet
/Arbad (az[Wymkn Classification v
v,
p Code C
Quality 4
Seismic II Cleanliness D
198 046
-: