%MurNBcontrolrod041651; ]> Memorandum from A.Waltner and N. Underwood to Dr. Clifford Beck [a machine-readable transcription] Waltner, Arthur Underwood, Newton Creation of machine-readable version: Russell S. Koonts Creation of digital images: Russell S. Koonts Conversion to TEI.2-conformant markup: NCSU Science and Technology Electronic Text Center. ca. 9 kilobytes NCSU Libraries. Raleigh, NC. Modern English, MurNBcontrolrod041651

Available from: NC State University Archives

Publicly-accessible

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

 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 A. Waltner and N. Underwood to Dr. Clifford Beck <author>Arthur Waltner</author> <author>Newton Underwood</author> <respStmt> <resp/> <name/> </respStmt> </titleStmt> <editionStmt> <p></p> </editionStmt> <extent>1 p.</extent> <publicationStmt> <publisher></publisher> <pubPlace></pubPlace> <date></date> <idno>Manuscript copy consulted: NCSU Libraries call number UA105.16</idno> </publicationStmt> <seriesStmt> <p/> </seriesStmt> <notesStmt> <note></note> </notesStmt> </biblFull> </sourceDesc> </fileDesc> <encodingDesc> <projectDesc> <p>Prepared for the NCSU Libraries Science and Technology Electronic Text Project.</p> </projectDesc> <editorialDecl> <p>Spell-check and verification made against printed text using Notetab spell checker.</p> <p>The lineation of the manuscript has been maintained and all end-of-line hyphens have been preserved.</p> <p>The images exist as archived TIFF images, one or more JPEG versions for general use, and thumbnails.</p> <p id="ETC">Keywords in the header are a local Electronic Text Center scheme to aid in establishing analytical groupings.</p> </editorialDecl> <refsDecl> <p>ID elements are given for each page element and are composed of the text's unique cryptogram and the given page number, as in NEprop033050a for the title page of Clifford Beck's Proposal.</p> </refsDecl> <classDecl> <taxonomy id="LCSH"> <bibl> <title>Library of Congress Subject Headings April 16, 1951 English non-fiction; prose LCSH 24-bit color; 400 dpi Memorandum from A. Waltner and N. Underwood to Dr. Clifford Beck Typescript 1 p. April 16, 1951 MurNBcontrolrod041651

NCSC-16 April 16, 1951 TO: Dr. Clifford Beck FROM: A. Waltner and N. Underwood SUBJECT: Control Rod Mechanism

The pull which can be exerted by a Brown recorder balancing motor to move the pen was measured and found to be approximately 10 lbf. The time required for a full scale motion of the pen without 10 lbf load was found to be approximately 20 sec. When the 10 lbf load was applied the time for full scale travel was approximately 27 sec. Since it is anticipated that the time desired for the complete withdrawal of the control rod is 15 min, it is seen that the additional gear reduction which will be needed will result in a theoretical pull of about 300 lbf. This so far exceeds the requirements that it is unnecessary to make estimates to take friction into account.

Therefore, it is concluded that a Modified Brown Recorder mechanism may be suitable for moving the rods.

CC: Reactor Committee