ML19224B295
| ML19224B295 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 02/28/1976 |
| From: | Metropolitan Edison Co |
| To: | Mullinix W NRC/IE |
| References | |
| TM-0304, TM-304, ZAR-760228-2, NUDOCS 7906140413 | |
| Download: ML19224B295 (8) | |
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w FINAL SYSTEM DESCRIPTION (Index No. 55)
NUCLEAR PLANT HYDROGEN SUPPLY SYSTEM (B&R Dwg. No.
2626, Rev. 3)
JERSEY CENTRAL PCWER AND LIGHT CCMPANY THREE MILE ISLAND NUCLEAR STATION UNIT NO. 2 Issue Date February, 1976 Prepared by:
fJ. A.
Cameron 198 048 Burns and Roe, Inc.
700 Kinderkamack Road
- Oradell, N.J.
07649 e
TABLE OF CONTENTS FOR NUCLEAR PLANT HYDROGEN SUPPLY SYSTEM Section Pace
1.0 INTRODUCTION
1 1.1 System Functions 1
1.2 Summary Description of the System 1
1.3 System Design Requirement:
1 2.0 DETAILED DESCRIPTION OF SYSTEM 2
2.1 Components 2
2.2 Instruments, Controls, Alarms and 2
Protective Devices 3.0 PRINCIPAL MODES OF OPERATION 3
(
3.1 Startup 3
3.2 Normal Operation 3
3.3 Shutdown 3
3.4 Special or Infrequent Operation 4
3.5 Emergency 4
4.0 HAZARDS AND PRECAUTIONS 4
9 198 049 f~
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APPENDIX TITLE TABLE NO.
Instrumentation and Controls 1
Panel Mounced Annunciators and 2
Computer Inputs s, /
g 198 050 C
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r-NUCLEAR PLANT HYDROGEN SUPPLY SYSTEM
1.0 INTRODUCTION
1.1 System Functions The Nuclear Plant Hydrogen Supply System stores a nuclear grade hydrogen and supplies it -at a reduced pressure to the Make-up tank (MU-T-1) in the Auxiliary Building.
Hydrogen is used in the primary coolant to reduce the concentration of free oxygen.
The Reactor Coolant Make-up and Purification System (Dwg.No.2024) interfaces with this system.
1.2 Summarv Description of System (Ref. B&R Dwa. 2626, Rev. 3)
The system is essentially a piping manifold which delivers hydrogen from high pressure storage bottles to the make-up tank.
This system contains a pressure reducer, pressure switches and indicators, a relief valve and pressure alarms as well as piping and valves for control and monitoring of hydrogen gas supplied to the tank.
1.3 System Desien Recuirements All piping is of carbon steel and is classified as conventional piping (Symbol C), designed, fabricated, inspected and erected in accordance with ANSI B31.1.0, Power Piping.
Piping seis-mic design classification is Class II.
All piping from the hydrogen storage bottles to valves HY-V 30 and HY-V31 is desig'ned
~
for 2700 PSIG and 100 F.
The remainder of the system is de-signed for 150 PSIG and 100 F.
A ~
i
2,0 DETAILED DESCRIPTION OF THE SYSTEM 2.1
.Comoonents
( ~.1.1 Tanks There are four standard 7 cubic-foot hydrogen bottles (Type A) which comprise the hydrogen storage tanks.
The tanks are supplied at a pressure of approximately 2000 psig, and are replaced when pressure in these tanks drops below a prede-termined pressure.
The hydrogen bottle rack is located in the yard area in the hydrogen storage area adjacent to the TMI Unit No. 1 Control Building.
The 2200 psig to 15 psig reducing station is located adjacent to the bottle rack.
2.I.2 Maior Svstem valves Hvdrocen to Make-Up Tank Pressure Control Valves HY-V144A, 44B A 1/4 inch pressure control valve (HY-U44A), which is constructed of carbon steel and is designed for 2500 psig (ANSI), is used to reduce hydrogen pressure from approximately 2200 psig to 15 psig.
Valve HY-V44B, identical to HY-V44A, is installed C/
.i in a by-pass line around valve HY-V44A as a Back-up.
2.2 Instruments, Alarms, Controls, and Protective Devices Pressures can be 'onitored by local pressure indicators and, in addition, pressure switches are provided to give remote high and low pressure alarms in the Control Room.
All instruments and control devices are listed in Table 1 and all alarms are listed in Table 2.
A 1"
inch relief valve, HY-R1, which relieves at 90 psig, is provided on the 15 psig header and relieves to atmosphere via a 1 inch Exhaust Line.
This relief valve is provided to protect the piping supplying the make-up tank.
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198 052
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3.0 bRINCIPAL MODES OF OPkRATION 3.1 start-up
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To start the nuclear plant hydrogen supply sys tem, hydrogen bottles are connected to the header and pressure control valves HY-V44A is set for 15 psig.
Hydrogen is then supplied to the make-up and purification system at 15 psig.
3.2 Normal Operation Nuclear grade hydrogen, stored at approximately 2CJO psig, enters the inch hydrogen manifold through bottle isolation valves HY-VlA, HY-VlB, HY-VlC, and HY-VlD and manifold isolation valvcs HY-V27A, HY-V27B, HY-V27C and HY-V27D.
A full pressure h inch hose connection is provided from the header with isolation valves HY-V22 and HY-V28.
A pressure switch HY-PS-1471 and Low pressure alarm HY-PAL-1471, set at 150 psig, are provided to monitor the header pressure ahead of the reducer station.
The reducing station is comprised of two parallel reducers and isolation valves for redundancy; HY-V44A reducing valve with valves HY-V29 & HY-V30 as isolation valves, and HY-V44B reducing valve with valves HY-V31 & HY-V43 for isolation.
Pressure relief valve HY-R1, which relieves at 90 psig, is located on a 1 inch branch line downstream from the reducing station and has a 1 inch vent line to the atmosphere through the corridor roof.
Downstream frcm the vent line the hydrogen line reduces to inch diameter.
High and Low pressure switches HY-PS-1474 and HY-PS-1473 respectively actuate High/ Low Pressure Alarm HY-PAH-1473 A
inch Globe valve HY-V46 is provided in the line as it passes through the connecting corridor between Unit 1 and Unit 2.
Valve HY-V8 is the root valve to the local pressure indicator (B&W)
MU-20-PI in the Auxiliary Building.
A hose connection HY-Ull is provided with block valves HY-V9 and HY-V26.
The piping continues through Filter HY-U9 to the Make Up and Purification System at valve MU-V28.
198 053
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3.3 Shutdown 5.
The nuclearhydrogen supply system is not shut down under
(
normal circurastances.
If maintenance must be performed, then all or a section of this system can be isolated by shutting
~
ths Appropriate isolation valves.
3.4 Special or Infrecuent Coeration None.
3.5 Emercency 4.0 HAZARDS AND PRECAUTIONS Hydrogen in an oxygen atmosphere can be highly flammable or explosive, depending on the precentage of concentration.
Therefore, smoking or other open flame must be prohibited in the hydrogen bottle storage area.
In addition, a " soap test" or other non-flammable leak check test should be per-formed on all hydorgen bottle fittings following installation b'
of new bottles.
When p] acing the pressure reducing sta tion in service, care must be exercised to increase pressure slowly in order to prevent damage to the pressure control valve.
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FINAL SYSTEM DESCRIPTION (Index No. 55)
NUCLEAR PLANT HYDRCGEN SUPPLY SYSTEM (B&R Dwg. No. 2626,'Rev. 3)
JERSEY CENTRAL PCWER AND LIGHT COMPANY THREE MILE ISLAhD NUCLEAR STATION UNIT NO. 2 Issue Date February, 1976 Prepared by:
GI. A. ~ Cameron Burns and Roe, Inc.
700 Kinderkamack Road
- Oradell, N.J.
(_
07649 198 056
~
. =..
(.
TABLE OF CONTENTS FOR NUCLE W PLANT HYDROGEN SUPPLY SYSTEM Section Pace
1.0 INTRODUCTION
1 1.1 System Functions 1
1.2 Summary Description of the System 1
1.3 System Design Requirements 1
2.0 DETAILED DESCRIPTION OF SYSTEM 2
2.1 Components 2
2.2 Instruments, Controls, Alarms and 2
Protective Devices 3.0 PRINCIPAL MODES OF OPERATION 3
(
3.1 Startup 3
3.2 Normal Operation 3
3.3 Shutdown 3
3.4 Special or Infrequent Operation 4
3.5 Emergency 4
4.0 HAZARDS AND PRECAUTIONS 4
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198 057
~
- 2.
APPENDIX TITLE TABLE NO.
Instrumentation and Controls 1
Panel Mounted Annunciators and 2
Computer Inputs O
e 198 058
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NUCLEAR PLANT HYDROGEN SUPPLY SYSTEM
1.0 INTRODUCTION
1.1 System Functions The Nuclear Plant Hydrogen Supply System stores a nuclear grade hydrogen and supplies it at a reduced pressure to the Make-up tank (MU-T-1) in the Auxiliary Building.
Hydrogen is used in the primary coolant to reduce the concentration of free oxygen.
The Reactor Coolant Make-up and Purification System (Dwg.No.2024) interfaces with this system.
1.2 Summarv Descr iction of Svstem (Ref. B&R Dwc. 2626, Rev. 3)
The system is er.sentially a piping manifold which delivers hydrogen from high pressure storage bottles to the make-up tank.
This system cantains a pressure reducer, pressure switches and indicator 3, a relief valve and pressure alarms ac well as piping and va?.ves for control and monitoring of hydrogen gas supplied to the tank.
1.3 System Desian Recuirements All piping is of carbon steel and is classified as conventional piping (Symbol C), designed, fabricated, inspected and erected in accordance with ANSI B31.1.0, Power Piping.
Piping seis-mic design classification is Class II.
All piping from the
[
hydrogen storage bottles to valves HY-V 30 and HY-V31 is desig'ned for 2700 PSIG and 100 F.
The remainder of the system is de-signed for 150 PSIG and 100 F.
198 059..
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2.0 DETAILED DESCRIPTION OF' THE SYSTEM 3.1
.Comoonents -
( l.1 Tanks There are four standard 7 cubic-foot hydrogen bottles (Type A) which comprise the hydrogen storage tanks.
The tanks are supplied at a pressure of approximately 2000 psig, and are replaced when pressure in these tanks drops below a prede-termined pressure.
The hydrogen bottle rack is located in the yard area in the hydrogen storage area adjacent to the TMI Unit No. 1 Control Building.
The 2200 psig to 15 psig reducing station is located adjacent to the bottle rack.
2.I.2 Maior System Valves Hvdrogen to Make-Uo Tank Pressure Control Valves Hv-V144A, 44B A 1/4 inch pressure control valve (HY-U44A), which is constructed of carbon steel and is designed for 2500 psig (ANSI), is used to reduce hydrogen pressure from approximately 2200 psig to 15 psig.
Valve HY-V44B, identical to HY-V44A, is installed in a by-pass line around valve HY-V44A as a Back-up.
2.2 Ins t.r umen t s, Alarms, Controls, and Protective Devices Pressures can be monitored by local pressure indicators and, in addition, pressure switches are provided to give remote high and low pressure alarms in the control Room.
All instruments and control devices are listed in Table 1 and all alarms are listed in Table 2.
A 1"
inch relief valve, HY-R1, which relieves at 90 psig, is provided on the 15 psig header and relieves to atmosphere via a 1 inch Exhaust Line.
This relief valve is provided to protect the piping supplying the make-up tank.
198 060
3.0 PRINCIPAL MODES OF OPERATION 3.1 Start-up To start the nuclear plant hydrogen supply system, hydrogen
(
bottles are connected to the header and pressure control valves HY-V44A is set for 15 psig.
Hydrogen is then supplied to the make-up and purification system at 15 psig.
3.2 Normal Operation Nuclear grade hydrogen, s tored at approximately 2000 psig, enters the inch hydrogen manifold through bottle isolation valves HY-VLA, HY-VlB, HY-VlC, and HY-VlD and manifold isolation valves HY-V27 A, HY-v27B, HY-V27C and HY-V27D.
A full pressure inch hose connection is provided from the header with isolation valves HY-V22 and HY-V28.
A pressure switch HY-PS-1471 and Low pressure alarm HY-PAL-1471, set at 150 psig, are provided to monitor the header pressure ahedd of the reducer station.
The reducing station is comprised of two parallel reducers and
{-
isolation valves for redundancy; HY-V44A reducing valve with valves HY-V29 & HY-v30 as isolation valves, and HY-V44B reducing valve with valves HY-V31 & HY-V43 for isolation.
Pressure relief valve HY-R1, which relieves at 90 psig, is located on a 1 inch branch line downstream frcm the reducing station and has a 1 inch vent line to the atmosphere through the corridor roof.
Downstream from the vent line the hydrogen line reduces to inch diameter.
High and Low pressure switches HY-PS-1474 and HY-PS-1473 respectively actuate High/ Low Pressure Alarm EY-PAH-1473 A
inch Globe valve HY-V46 is provided in the line as it passes through the connecting corridor between Unit 1 and Unit 2.
valve HY-V8 is the root valve to the local pressure indicator (B&W)
MU-20-PI in the Auxiliary Building.
A hose connecticn HY-Ull is provided with block valves HY-V9 and HY-V26.
The piping continues through Filter HY-U9 to the Make Up and Purification System at k_
valve MU-V28.
198 061 i
3.3 Shutdown The nuclearhydrogen supply system is not shut down under normal circumstances.
If maintenance must be performed, then all or a section of this system can be isolated by shutting the appropriate isolation valves.
3.4 Soecial or Infrecuent coeration None.
3.5 Emercency 4.0 HAZARDS AND PRECAUTIONS Hydrogen in an oxygen atmosphere can be highly flammable or e< plosive, depending on the precentage of concentration.
Therefore, smoking or other open flame must be prohibited in the hydrogen bottle storage area.
In addition, a " soap test" or other non-flammable leak check test should be per-formed on all hydorgen bottle fittings following installation of new bottles.
When placing the pressure reducing sta tion in service, care must be exercised to increase pressure slosly in order to prevent damage to the pressure control valve.
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