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Nitrogen 12
N{sup 12} is shown to have a half life of 12.5 {+-} 1 milliseconds, and a positron upper limit of 16.6 {+-} 0.2 Mev. It is produced by the reaction C{sup 12}(p,n)N{sup 12}, and has a threshold proton energy of 20.0 Mev. This indicates that N{sup 12} is within about 200 Kev of being unstable against proton emission. The mass of N{sup 12} is 12.0228 {+-} 0.00015, and the beta transition is allowed.
Date:
January 19, 1949
Creator:
Alvarez, Luis W.
System:
The UNT Digital Library
100 Areas technical progress report: Physics, August 1949
This monthly report details 100 Area technical activities of the Physics Group for the month of August 1949.
Date:
September 19, 1949
Creator:
Gast, P. F.
System:
The UNT Digital Library
Monthly Health Information. August 1-31, 1949
None
Date:
September 19, 1949
Creator:
Boozer, A. H.
System:
The UNT Digital Library
Final report on Production Test No. 105-245-P -- Effectiveness of cadmium coated splines
This report discussed cadmium coated splines which have been developed to supplement the regular control rod systems under emergency shutdown conditions from higher power levels. The objective of this test was to determine the effectiveness of one such spline placed in a tube in the central zone of a pile, and of two splines in the same tube. In addition, the process control group of the P Division asked that probable spline requirements for safe operation at various power levels be estimated, and the details included in this report. The results of the test indicated a reactivity value of 10.5 {plus_minus} 1.0 ih for a single spline, and 19.0 ih {plus_minus} 1.0 ihfor two splines in tube 1674-B under the loading conditions of 4-27-49, the date of the test. The temperature rise of the cooling water for this tube under these conditions was found to be 37.2{degrees}C for 275 MW operation.
Date:
May 19, 1949
Creator:
Carson, A. B.
System:
The UNT Digital Library
Hanford Works monthly report, March 1949
This is a progress report of the production reactors on the Hanford Reservation for the month of March 1949. This report takes each division (e.g. manufacturing, medical, accounting, occupational safety, security, reactor operations, etc.) of the site and summarizes its accomplishments and employee relations for that month. (MB)
Date:
April 19, 1949
Creator:
Prout, G. R.
System:
The UNT Digital Library
Thermal Stress Tests of KS Graphite
A program was initiated to determine the thermal rupture characteristics of KS graphite under steady-state operating conditions simulating the thermal conditions of an uninhibited rocket reactor. The maximum thermal stress calculated using room-temperature properties was 3090 psi. The maximum net specific power obtained was 5.2 Btu/cu in.-sec. (B.O.G.)
Date:
July 19, 1949
Creator:
Crocker, A.R.
System:
The UNT Digital Library