%MurNBinstrumentation052252; ]> Memorandum from N. Underwood, A. Waltner, and G. Webb to Clifford K. Beck Machine readable transcription Underwood, N. Waltner, A. Webb, G. Creation of machine-readable version: Russell S. Koonts Creation of digital images: Russell S. Koonts Conversion to TEI.2-conformant markup: Russell S. Koonts ca. 9 kilobytes NCSU Libraries Raleigh, NC Modern English, MurNBinstrumentation052252

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URL: http://www.lib.ncsu.edu/archives/etext/engineering/reactor/murray/

 3 November, 2000

Nuclear Reactor Digitization Project

Raymond L. Murray Reactor Project Notebook

 Illustrations have been included from the print version. Scanned by Russell Koonts with Photoshop 5.0 software. Memorandum from N. Underwood, A. Waltner, and G. Webb to Clifford K. Beck N. Underwood A. Waltner G. Webb

3 pp. Manuscript copy consulted UA 105.16

Prepared for the North Carolina State University Science and Technology Electronic Text Center

The lineation of the manuscript has been maintained and all end-of-line hyphens have been preserved.

Keywords in the header are a local Science and Technology Electronic Text Center scheme to aid in establishing analytical groupings.

Library of Congress Subject Headings May 22, 1952 English LCSH manuscript 24-bit color: 400 dpi Memorandum from N. Underwood, A. Waltner, and G. Webb to Clifford K. Beck Typescript 3 pp. May 22, 1952 MurNBinstrumentation052252

Reac Memo Submitted May 22, 1952 TO: Clifford K. Beck FROM: N Underwood, A Waltner, and G Webb CC: Reactor Committee SUBJECT: Instrumentation requirements for Achieving Critical Mass

These intrumentation requirements are of a dual nature. First, the instrumentation specifically needed for the technical operation of determining the critical mass. Secondly, the instrumentation required from the viewpoint of possible hazards which might arise from some accidental occurrence.

The instrumentation falling in the first category is as follows- 1. U235 pulse channel2. BF3 " "3. BF3 " "These have sluggish level trips4. BF3 " "5. B10 integrating channel6. B10 " "These have fast level trips andare the primary safeties7. γ " "8. Liquid level indicator9. Rod and shim position indicators10. Sampling and liquid transfer device11. Monitoring systems for the critical procedures a. α monitorb. air monitorc. personnel monitors - film n sensitivefilm Β, γ sensitivedosimeter n sensitivedosimeter Β, γ sensitive

In the second classification we have the following- 1. Campus monitors installed in permanent locations 2. Stack monitor 3. Dust monitor 4. Mobile monitor 5. Alarm system 6. Gas masks (closed cycle) 7. Liquid monitor 8. Indium foils 9. Recombiner and gas disposal system

Below are listed partial cost estimates- 1.U235 pulse chambercost information unavailable Atomic Inst 205B120. " " 204B395. " " 1010 scaler430. " " 410 rate meter325. Keleket timer60. Cable and connectors(50) Level trip modification(100) 2.BF3 G.E, or R C L130 or 105. Nuclear Inst 128 scaler525. Atomic Inst 410 rate meter325. Cable and connectors(50) Level trip modification(100) 3.Duplicate of 2 4.Duplicate of 2 except omit ratemeter 5.B10 ionization chamber(400) Shop estimate from Mr. Morris(100) Quartz insulation from G E(100) Special alloy materials Dow(100) Special B10 coating.. requires special techinque involving induction heating with inter gas flow. It may be advisable to make arrangements with Gundlach to have him coat our chambers. This cost cannot be estimated. Pre amp(250) Level trip(100) Difference amp(50) Cabling(200) Pure lead shield(50) 6.Duplicate of 5 except add 3 motors105. 7. Scintillation γ channel. This has not been studied with sufficient care to make a sound estimate but it it believed that it will be of the order of(1000) 8.Liquid level indicator (see Lancaster) 9.Rod and shim position indicators approximatelytotal(50) 10.Sampling and liquid transfer (see Beck) 11.Monitoring for critical procedures 2 α Zeuto750 air monitor(100) personnel monitor per person  2 film badge10.  2 dosimeters Β, γ25.   " neutron50. use reading devices already have

1. Campus monitors installed in permanent(1200) 2. Stack monitor(1000) 3. Dust monitor(200) 4. mobile monitorno estimate 5. Alarm systemno estimate (6. Consoleno estimate ) 7. Liquid monitor(2500) 8. Log channel submitted to Nuclear Inst? 9. Indium foilsno estimate 10. Recombiner and disposal system (Menius and Murray) 11. Gas masks(300) General Interlocks, light panel, and hook up(1500)