ISRAEL RESEARCH REACTOR IRR-1. PART II. STARTUP TESTS

Technical Report · Sun Jan 01 04:00:00 EST 1961

OSTI ID:4786779

Pelled, Z; Kahan, R S

ABS>Tests made during the pre-critical, approach to critical, and low power experiments, and during initial operation at 1 Mw of the Israel Research Reactor-I are described. Critical experiments, control rod calibrations, neutron flux measurements and the reactivity effects of temperature and experimental facilities are included. Core loadings with available excess reactivities (% DELTA K) of 0.37 to 4.32%, and 0.24 to 2.03%, respectively, were tested in the pool and stall positions. The regulating rod worths obtained for different core loadings and with various control rod settings ranged from 0.285 to 0.367% DELTA K. The shimrod worths for core loading SK 1 were in the 2.3 to 3.7% range. The shim-rod bank of 5 shim-rods, withdrawn to the 60% setting was worth 11.3% excess reactivity, indicating that the reactor had sufficient control capacity. The re activity effect of the facilities around the stall position was about 1.37% DELTA K for core loading SK 1. The total worth of water filling all the beam tubes was 1.24%, and the effect of material in the pneumatic tubes was negligible. The temperature coefficient of reactivity was --3.6 x 10/sup -4/ per degree at 30.3 deg C. (auth)

• Research Organization: Israel. Atomic Energy Commission, Tel Aviv
• NSA Number: NSA-16-030134
• OSTI ID: 4786779
• Report Number(s): IA-686
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CONTROL ELEMENTS
CRITICALITY
DISTRIBUTION
LABORATORY EQUIPMENT
MEASURED VALUES
NEUTRON BEAMS
NEUTRON FLUX
OPERATION
PNEUMATICS
REACTIVITY
REACTOR CORE
REACTOR FUELING
REACTOR TECHNOLOGY
RESEARCH REACTORS
STANDARDS
STARTUP
TEMPERATURE
TESTING
VARIATIONS
WATER COOLANT
WATER MODERATOR