Compilation of data from EBR-II natural-circulation-test procedure EX-140, Section IV, Addendum 8A
The transition from forced to natural-circulation flow of primary coolant after loss of primary pumping power with concomitant reactor scram has been experimentally examined in Experimental Breeder Reactor No. II. In addition, the electrical power to the secondary-system pump was cut off several seconds after the loss of primary-system pumping power. Before the transient, the reactor was operated at 21.8 MW(t) (36.3% of the normal full-power value) and 40.0% of normal full primary flow. All electrical power to the primary pumping system was abruptly cut off, thereby causing the flow rate of the primary-system coolant to coast down. The loss of primary pumping power caused a scram, which immediately shut down the reactor. Data were collected by the EBR-II data-acquisition system from the usual plant process instrumentation and instrumented subassembly XX08. The method used to correct the data for signal offsets is discussed. The corrected test data are presented graphically.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-31109-ENG-38; NONE
- OSTI ID:
- 711590
- Report Number(s):
- ANL/EBR--113; 194311
- Country of Publication:
- United States
- Language:
- English
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