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Cold Source Engineering: Operation and Upgrade of the BT-9 Cold Source, Nicknamed “PeeWee” James Torres B.S. Physics, Rowan University Mentor: Michael Middleton Director: Julie Borchers Photo: Wisegeek.org

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Page 1: Cold Source Engineering - ncnr.nist.gov · Valtek Actuator PHPK Valve Valtek Flowserve Brochure. Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer Positioner

Cold Source Engineering:Operation and Upgrade of the BT-9 Cold Source,

Nicknamed “PeeWee”

James TorresB.S. Physics, Rowan University

Mentor: Michael Middleton

Director: Julie Borchers

Photo: Wisegeek.org

Page 2: Cold Source Engineering - ncnr.nist.gov · Valtek Actuator PHPK Valve Valtek Flowserve Brochure. Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer Positioner

Overview

1. What is PeeWee?

2. What is an issue currently needing resolution?

3. What is the solution?

Page 3: Cold Source Engineering - ncnr.nist.gov · Valtek Actuator PHPK Valve Valtek Flowserve Brochure. Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer Positioner

What is PeeWee?

National Bureau of Standards Reactor (NBSR)

PeeWee = BT-9 Cold Source

Photo: bnl.gov Nuclear Science & Technology Department

Multi-Axis Crystal Spectrometer(MACS)

Page 4: Cold Source Engineering - ncnr.nist.gov · Valtek Actuator PHPK Valve Valtek Flowserve Brochure. Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer Positioner

Heavy Water

Helium Gas

Vacuum Liquid Hydrogen

Cryostat: Navneet Gill, 2011Fission: atomicarchive.comCryostat

Liquid in

Vapor out

Page 5: Cold Source Engineering - ncnr.nist.gov · Valtek Actuator PHPK Valve Valtek Flowserve Brochure. Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer Positioner

Thermal Neutrons 2 Å

20 K Cold Source

Cold Neutrons 6 Å

2000 Researchers

99% CNS Operation

Photo credit: Robert Williams, ROE

Page 6: Cold Source Engineering - ncnr.nist.gov · Valtek Actuator PHPK Valve Valtek Flowserve Brochure. Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer Positioner

Overview

1. What is PeeWee?

2. What is an issue currently needing resolution?

● PeeWee condenser helium temperature

3. What is the solution?

Page 7: Cold Source Engineering - ncnr.nist.gov · Valtek Actuator PHPK Valve Valtek Flowserve Brochure. Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer Positioner

PeeWee Condenser

2 atmospheresb.p. ~ 22.9 K

Low Mass Flow Rate

Page 8: Cold Source Engineering - ncnr.nist.gov · Valtek Actuator PHPK Valve Valtek Flowserve Brochure. Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer Positioner

Thermosiphon

Page 9: Cold Source Engineering - ncnr.nist.gov · Valtek Actuator PHPK Valve Valtek Flowserve Brochure. Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer Positioner

Overview

1. What is PeeWee?

2. What is an issue currently needing resolution?

● PeeWee condenser helium temperature

3. What is the solution?

● Bypass + Valve

Page 10: Cold Source Engineering - ncnr.nist.gov · Valtek Actuator PHPK Valve Valtek Flowserve Brochure. Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer Positioner

Refrigeration Cycle

Page 11: Cold Source Engineering - ncnr.nist.gov · Valtek Actuator PHPK Valve Valtek Flowserve Brochure. Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer Positioner

Upgrade

CV452

C100 Photo CreoElements 3D Model PHPK Manual

Bypass Valve

Disclaimer: Use and mention of valve and valve accessories does not imply NIST endorsement

Page 12: Cold Source Engineering - ncnr.nist.gov · Valtek Actuator PHPK Valve Valtek Flowserve Brochure. Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer Positioner

PHPK manual

Actuator

Stem

Plug

Valtek ActuatorPHPK Valve

Valtek Flowserve Brochure

Page 13: Cold Source Engineering - ncnr.nist.gov · Valtek Actuator PHPK Valve Valtek Flowserve Brochure. Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer Positioner

Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer

Positioner

Page 14: Cold Source Engineering - ncnr.nist.gov · Valtek Actuator PHPK Valve Valtek Flowserve Brochure. Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer Positioner

Transducer

Beta Positioner

Transducer & Positioner Operation

Page 15: Cold Source Engineering - ncnr.nist.gov · Valtek Actuator PHPK Valve Valtek Flowserve Brochure. Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer Positioner

FlowservePosition Pac

Manual adjustment of LS cam and lever

Limit Switch

Page 16: Cold Source Engineering - ncnr.nist.gov · Valtek Actuator PHPK Valve Valtek Flowserve Brochure. Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer Positioner

P-ProportionalI-IntegralD-Derivative

- Controller

Error = e = SP - PV

𝐶𝑉 𝑡 = 𝑲𝒑 ∙ 𝐞 𝑡 + 𝑲𝒊 ∙ 0

𝑡

𝐞 𝜏 𝑑𝜏 + 𝑲𝒅 ∙𝑑

𝑑𝑡𝐞 𝑡

PID controller block used in RS LOGIX 5000

Page 17: Cold Source Engineering - ncnr.nist.gov · Valtek Actuator PHPK Valve Valtek Flowserve Brochure. Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer Positioner

Closing

October 18 – November 11

• Wire Diagrams; creating, updating, and reading

• Soldering

• Pin Connectors

• RS LOGIX 5000 ladder logic programming software

• Creo Elements solid modeling software

• MakerBot 3D printer

• Helium Mass Spectrometry for vacuum testing

• Vacuum Gauge; testing and calibrating vacuum range

• Calibrator for a dummy signal in testing valve position

Page 18: Cold Source Engineering - ncnr.nist.gov · Valtek Actuator PHPK Valve Valtek Flowserve Brochure. Flowserve Left: Beta Positioner Right: NT3000 Electro-Pneumatic Transducer Positioner