Memorandum from Raymond L. Murray and A. C. Menius, Jr. to Dr. Clifford K. Beck

%MurNBweight080251; ]> Memorandum from Raymond L. Murray and A. C. Menius, Jr. to Dr. Clifford K. Beck Machine readable transcription Murray, Raymond L. Menius, A. C., Jr. 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, MurNBweight080251

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

20 October, 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 Raymond L. Murray and A. C. Menius, Jr. to Dr. Clifford K. Beck Raymond L. Murray A. C. Menius, Jr.

2 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.

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Library of Congress Subject Headings August 2, 1951 English LCSH manuscript 24-bit color: 400 dpi Memorandum from Raymond L. Murray and A. C. Menius, Jr. to Dr. Clifford K. Beck Typescript 2 pp. August 2, 1951 MurNBweight080251

212 lb/ft3Aug 2, 1951NCSC-29CORRECTEDRM TO: Dr. Clifford K. Beck FROM: Raymond L. Murray and A. C. Menius, Jr. SUBJECT: Weight of Reactor Shield CC: Newton Underwood and A. W. Waltner

For purposes of estimating needs for material in the reactor shield, and for crane load considerations, the volumes and weights are computed. Voids due to various pipes are neglected.
Figure 1

A. Cap. Consider one quadrant as in figure 2.

The system can be further subdivided into fourths.

If the Level is excluded, the triangular block has a volume 1/2 (6) (6 tan 22 1/2°) (2.5) = 18.64 ft.3 The volume beveled off is-- 1/2 (1.5) (1.5) (5.25 tan 22 1/2°) = 2.45 ft.3, leaving a volume of 16.19 ft.3 or 64.76 ft.3 total. The correction to ac- count for the removable top block 1' x 1' x 1' = 1 ft.3, and the overhang into the reactor cavity of 2.5' x 2.5' x 4" = 2.08 ft.3 is a net 108 ft.3. Thus, each quadrant of the cap is 65.84 ft.3, with a density of 213 lb./ft3. The weight is 14,024 lb. = 7.01 tons.

B. The area of this block is = (4) (3.5) - 1/2 (1.5) (1.5) - 2 (1.5) = 14 - 1.125 - 3 = 9.875 ft.2. Subtract the recess 3" x 6" = .125 ft3, leaving 9.75 ft.2, or a volume of (9.75) (6) = 48.75 58.50 ft.3, a weight of 10,384 lb. 12,460 lb or 5.19 6.23 tons.

C. The area of this block is = (3.5) (3.5) - (1.5) (1.5) (1) (0.25) = 12.25 - 2.25 - 0.25 = 9.75 ft.32 The volume and weight is thus the same as for A.B. 58.5 ft3, 12,460 lb, 6.23 tons

D. The slab may be considered as being two pieces of total volume 5' x 5' x 6" = 12.3 ft.3 plus 5' 6" x 5' 6" x 6" = 15.125 ft.3 or 27.625 ft.3, weight 5,884 lb. or 2.94 tons.

E. Divide the slab into two parts of total volume 5 x 5 x 6" = 12.5 ft.3 plus 5' 6" x 5' 6" x 1' = 30.25 ft.3 or 42.75 ft.3 The weight is 9,106 lb. or 4.55 tons.

In order to determine the total weight of shield, including the per- manent sides, consider a solid octagon 8' 6", neglecting the bevel.

Since an octagon of diameter has an area .8284 d2, the volume of this port is (8.5)(0.8284)(17)2 = 2035.0 ft.3.

Subtract the following voids:a. Bevel. Divide the octagonal rim into 16 parts. the average length of each is (8.5+7./2) tan 22 1/2° =3.21 ft; the area is 1/2 (l.5) 1.5) = 1.125 ft.2 the volume is 3.611 ft.3. For 16 of these, the volume is 57.8 ft.3. b. Reactor Cavity. 8' 2" x 5' x 5' = 204.2 ft.3. c. Thermal column cavity. 5 x 5 x 5 = l25 ft.3 plus the ledge 3" x 1' x 5' = 1.25 ft.3, giving 126.2 ft.3.

The sum of the voids is 385.7 ft.3. The complete cap has a total volume (now including the top block of 4 ft.3) of 4(65.84) + 4 = 267.4 ft.3.

The final shield volume is 2035.0 - 385.7 + 267.4 = 1916.7 ft.3 or 71.0 yds.3

The weight is 408,200 lbs. or 204.1 tons.

Since there are a number of unoccupied spaces--exposure tubes, sample box, locks and ducts, this is probably high by a few per cent.