1 MICE Hydrogen System Elwyn Baynham, Tom Bradshaw, Iouri Ivaniouchenkov RAL MICE / RAL Safety...

11
1 MICE Hydrogen System Elwyn Baynham, Tom Bradshaw, Iouri Ivaniouchenkov RAL CE / RAL Safety Meeting @ RAL, 30 October 2003

Transcript of 1 MICE Hydrogen System Elwyn Baynham, Tom Bradshaw, Iouri Ivaniouchenkov RAL MICE / RAL Safety...

Page 1: 1 MICE Hydrogen System Elwyn Baynham, Tom Bradshaw, Iouri Ivaniouchenkov RAL MICE / RAL Safety Meeting @ RAL, 30 October 2003.

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MICE Hydrogen System

Elwyn Baynham, Tom Bradshaw, Iouri Ivaniouchenkov

RAL

MICE / RAL Safety Meeting @ RAL, 30 October 2003

Page 2: 1 MICE Hydrogen System Elwyn Baynham, Tom Bradshaw, Iouri Ivaniouchenkov RAL MICE / RAL Safety Meeting @ RAL, 30 October 2003.

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Hydrogen system: Conceptual points

• Closed system concept :

- hydrogen absorber and a storage unit form a single closed system in a way that hydrogen is either stored as a gas in the storage unit or is liquefied in the absorber;

- pressure in the system is always higher than the atmospheric pressure.

• Individual hydrogen system for each absorber

MICE / RAL Safety Meeting @ RAL, 30 October 2003

Ideally it is a truly passive system

Air can not leak inside the system

Safety pros:

Minimal amount of hydrogen per system

Page 3: 1 MICE Hydrogen System Elwyn Baynham, Tom Bradshaw, Iouri Ivaniouchenkov RAL MICE / RAL Safety Meeting @ RAL, 30 October 2003.

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Hydrogen system: Options

Hydrogen storage unit = large (about 30 m3) tank Pros: truly passive system Cons: about 100 m3 for the location of tanks (=> on the roof ?)

MICE / RAL Safety Meeting @ RAL, 30 October 2003

Page 4: 1 MICE Hydrogen System Elwyn Baynham, Tom Bradshaw, Iouri Ivaniouchenkov RAL MICE / RAL Safety Meeting @ RAL, 30 October 2003.

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Hydrogen system: Options

Alternative option:

Hydrogen storage unit = compact (< 1 m3) metal hydride bed

Pros: - very compact system (easier to collect hydrogen in case of leak) - hydrogen is stored as a solid compound Cons: not a passive system (requires active heater/cooler)

A question then: is it a reasonable compromise from the safety point of view ?

MICE / RAL Safety Meeting @ RAL, 30 October 2003

Page 5: 1 MICE Hydrogen System Elwyn Baynham, Tom Bradshaw, Iouri Ivaniouchenkov RAL MICE / RAL Safety Meeting @ RAL, 30 October 2003.

5P P VP Vacuum pumpBursting disk

Pressure relief valveValve

Pressureregulator

Pressuregauge

18 K Heto Compressorvia Radiation shield

14 K Hefrom Cold box

Liquid level gauge

LH2 Absorber

Vacuum

Vacuum vessel

LHe Heat exchanger

Hydrogen flow and safety system(option with a hydrogen tank)

Internal Window

70 K Safety window

H2 Gas bottle

PPFill valve

Hydrogen tank

Volume: about 30 m3

1.6 bar abs > Pressure > 1.1 bar abs

Vent outside flame arrester

He Purge system

Non-return valve

Vent outsideflame arrester

Vent valve

Vent valve

1.7 bar

2.1 bar

H2 Detector

H2 Detector

P

P

PP

Evacuated vent buffer tank

VP

P

VP

X 2X 2

VP

Version: 09/06/2003

Hydrogen module enclosure

H2 Detector

Ventilationsystem

Vent outsideflame arrester

Node 1

Node 2

Node 3

Node 4

Node 5

Page 6: 1 MICE Hydrogen System Elwyn Baynham, Tom Bradshaw, Iouri Ivaniouchenkov RAL MICE / RAL Safety Meeting @ RAL, 30 October 2003.

6P P VP Vacuum pumpBursting disk

Pressure relief valveValve

Pressureregulator

Pressuregauge

18 K Heto Compressorvia Radiation shield

14 K Hefrom Cold box

Liquid level gauge

LH2 Absorber

Vacuum

Vacuum vessel

LHe Heat exchanger

Hydrogen flow and safety system (option with a metal hydride storage unit)

Internal Window

70 K Safety window

H2 Gas bottle

PPFill valve

Metal hydride hydrogen storage unit

(20 m3 capacity)

Vent outside flame arrester

He Purge system

Non-return valve

Vent outsideflame arrester

Vent valve

Vent valve

1.7 bar

2.1 bar

H2 Detector

H2 Detector

P

P

PP

Evacuated vent buffer tank

VP

P

VP

X 2X 2

VP

Version: 06/08/2003

Hydrogen module enclosure

H2 Detector

Ventilationsystem

Vent outsideflame arrester

Chiller/ heaterunit

Node 1

Node2

Node 3

Node 4

Node 5

Page 7: 1 MICE Hydrogen System Elwyn Baynham, Tom Bradshaw, Iouri Ivaniouchenkov RAL MICE / RAL Safety Meeting @ RAL, 30 October 2003.

7MICE / RAL Safety Meeting @ RAL, 30 October 2003

Hydrogen system layout: Option with a hydrogen tank

Concrete radiation shielding Steel magnetic shielding

Hydrogen storage tank

H2 absorber

H2 buffertank

Page 8: 1 MICE Hydrogen System Elwyn Baynham, Tom Bradshaw, Iouri Ivaniouchenkov RAL MICE / RAL Safety Meeting @ RAL, 30 October 2003.

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H2

Storage unit

Ventilation duct

Radiationshieldingwall

H2

Buffer Tank

(1m3 approx)

H2 absorber

Vacuum jacket

MICE / RAL Safety Meeting @ RAL, 30 October 2003

Hydrogen system layout: Option with a hydrogen bed

Page 9: 1 MICE Hydrogen System Elwyn Baynham, Tom Bradshaw, Iouri Ivaniouchenkov RAL MICE / RAL Safety Meeting @ RAL, 30 October 2003.

9MICE / RAL Safety Meeting @ RAL, 30 October 2003

Hydrogen system layout: Option with a hydrogen bed

Page 10: 1 MICE Hydrogen System Elwyn Baynham, Tom Bradshaw, Iouri Ivaniouchenkov RAL MICE / RAL Safety Meeting @ RAL, 30 October 2003.

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MICE Layout Version: 28 October 2003

MICE / RAL Safety Meeting @ RAL, 30 October 2003

Page 11: 1 MICE Hydrogen System Elwyn Baynham, Tom Bradshaw, Iouri Ivaniouchenkov RAL MICE / RAL Safety Meeting @ RAL, 30 October 2003.

11MICE / RAL Safety Meeting @ RAL, 30 October 2003

Preliminary HAZOP recommendations

Hydrogen storage unit Implement: active pressure gauge temperature monitor

Hydrogen absorber internal vessel with hydrogen windows Implement: active pressure gauge temperature sensor active liquid level meter (additional) Hydrogen absorber vacuum jacket with safety windows Implement: active hydrogen sensor

Buffer tank Implement: active pressure gauge  active oxygen sensor

Hydrogen module enclosure Implement: ventilation system equipped with hydrogen detector.


1 MICE at RAL MICE Collaboration meeting @ RAL, 2 November 2003 Elwyn Baynham, Tom Bradshaw, Iouri Ivaniouchenkov, Tony Jones, Jim Rochford Engineering.

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