Gerald L Erickson

US Patent:

41031482, Jul 25, 1978

Filed:

Nov 24, 1976

Appl. No.:

5/744500

Inventors:

Gerald L. Erickson - Richland WA

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

G06M 314
G01T 100

US Classification:

235 92PC

Abstract:

A digital electronic circuit of especial use for subtracting background activity pulses in gamma spectrometry comprises an up-down counter connected to count up with signal-channel pulses and to count down with background-channel pulses. A detector responsive to the count position of the up-down counter provides a signal when the up-down counter has completed one scaling sequence cycle of counts in the up direction. In an alternate embodiment, a detector responsive to the count position of the up-down counter provides a signal upon overflow of the counter.

US Patent:

39821293, Sep 21, 1976

Filed:

Nov 22, 1974

Appl. No.:

5/526190

Inventors:

Kenneth R. Lattin - Richland WA
Gerald L. Erickson - Richland WA

Assignee:

The United States of America as represented by the United States Energy
Research and Development Administration - Washington DC

International Classification:

G01T 120

US Classification:

250364

Abstract:

Radioactive iodine is detected in the effluent cooling gas from a nuclear reactor or nuclear facility by passing the effluent gas through a continuously moving adsorbent filter material which is then purged of noble gases and conveyed continuously to a detector of radioactivity. The purging operation has little or no effect upon the concentration of radioactive iodine which is adsorbed on the filter material.