Cryogenic engineering and thermometry for an in-core apparatus

Journal Article · Tue Dec 31 04:00:00 EST 1996 · Transactions of the American Nuclear Society

OSTI ID:426363

Clark, D D; Spern, S A; Atwood, A G; Ouellet, C G; Decker, F H ^[1]

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1. Cornell Univ., Ithaca, NY (United States)

During the design, construction, and testing of the final model of the cold neutron source for the cold neutron beam facility of the Cornell TRIGA reactor, several interesting cryogenic and thermometric problems were encountered. This paper summarizes some of those problems and their solutions. The goal is to maintain an aluminum chamber containing 110cm{sup 3} of mesitylene at 30 K or below in the presence of radiation fields of 1 {times} 10{sup 12} thermal n/cm{sup 2} {center_dot} s, 3.8 x 10{sup 10} fast n/cm{sup 2} {center_dot} s, and 1.4 {times} 10{sup 3} rad/s of gamma rays known to exist at 500 kW within the beam port 17 cm from the core edge. Cooling is accomplished by conduction through a 1.85-cm-diam, 261-cm-long copper rod connecting the chamber to a two-stage Gifford-McMahon cryorefrigerator located outside the reactor bulk shield. It is desirable to measure the temperatures of the chamber, the refrigerator, and a number of other system components for monitoring and diagnostic purposes. The principal concerns are the heat loads and radiation effects caused by the nuclear radiation.

• OSTI ID: 426363
• Report Number(s): CONF-961103--
• Journal Information: Transactions of the American Nuclear Society, Journal Name: Transactions of the American Nuclear Society Vol. 75; ISSN 0003-018X; ISSN TANSAO
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
COLD NEUTRONS
COOLING
CORNELL TRIGA-MK-2 REACTOR
CRYOGENICS
HEAT TRANSFER
NEUTRON SOURCE FACILITIES
PHYSICAL RADIATION EFFECTS
TEMPERATURE MEASUREMENT