Analysis of proposed gamma-ray detection system for the monitoring of core water inventory in a pressurized water reactor

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An initial study has been performed of the feasibility of employing an axial array of gamma detectors located outside the pressure vessel to monitor the coolant in a PWR. A one-dimensional transport analysis model is developed for the LOFT research reactor and for a mock-PWR geometry. The gamma detector response to coolant voiding in the core and downcomer has been determined for both geometries. The effects of various conditions (for example, time after shutdown, materials in the transport path, and the relative void fraction in different water regions) on the detector response are studied. The calculational results have been validated ... continued below

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Markoff, D.M. December 1, 1987.

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Description

An initial study has been performed of the feasibility of employing an axial array of gamma detectors located outside the pressure vessel to monitor the coolant in a PWR. A one-dimensional transport analysis model is developed for the LOFT research reactor and for a mock-PWR geometry. The gamma detector response to coolant voiding in the core and downcomer has been determined for both geometries. The effects of various conditions (for example, time after shutdown, materials in the transport path, and the relative void fraction in different water regions) on the detector response are studied. The calculational results have been validated by a favorable comparison with LOFT experimental data. Within the limitations and approximations considered in the analysis, the results indicate that the gamma-ray detection scheme is able to unambiguously respond to changes in the coolant inventory within any vessel water region.

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NTIS, PC A10/MF A01; 1.

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  • Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted

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  • Other: DE88005785
  • Report No.: ANL-87-29
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/5430041 | External Link
  • Office of Scientific & Technical Information Report Number: 5430041
  • Archival Resource Key: ark:/67531/metadc1074815

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • December 1, 1987

Added to The UNT Digital Library

  • Feb. 4, 2018, 10:51 a.m.

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  • April 17, 2018, 4:05 p.m.

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Markoff, D.M. Analysis of proposed gamma-ray detection system for the monitoring of core water inventory in a pressurized water reactor, report, December 1, 1987; Illinois. (digital.library.unt.edu/ark:/67531/metadc1074815/: accessed November 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.