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Download Anticipated and Abnormal Plant Transients in Light Water by Joseph M. Hendrie (auth.), Pamela L. Lassahn, Debu Majumdar, PDF

By Joseph M. Hendrie (auth.), Pamela L. Lassahn, Debu Majumdar, George F. Brockett (eds.)

Over the final 30 years, reactor protection expertise has advanced no longer lots from a necessity to get over injuries or incidents, yet basically from many teams within the nuclear neighborhood asking hypo­ thetical, looking (what if) ~uestions. This ~uestioning has certainly paid off in constructing preventive measures for lots of sorts of occasions and strength injuries. stipulations, reminiscent of reactivity tours, huge holiday, lack of coolant, center soften, and comprise­ ment integrity loss, to call a number of, have been all at one time subject matters of protracted discussions on hypothesized occasions. traditionally, lots of those became multiyear, large-scale learn courses geared toward resolving the "what ifs. " For the subject of expected and irregular plant transients, how­ ever, the looking out ~uestions and the study weren't so prolific until eventually the mid-1970s. at the moment, probabilistic danger methodolo­ gies started to let us know we should always swap our emphasis in reactor defense study and improvement and concentration extra on small pipe breaks and plant transients. 3 Mile Island punctuated that message in 1979. The plant brief subject quarter is a multidisciplinary topic concerning not just the nuclear, fluid movement, and warmth move applied sciences, but additionally the synergistics of those with the reactor regulate structures, the protection s;,"stems, operator activities, upkeep or even administration and the industrial issues of a given plant.

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Additional resources for Anticipated and Abnormal Plant Transients in Light Water Reactors: Volume 1

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This causes a loss of reactor coolant pressure control due to loss of the pressurizer sprays. The result often is upper-head voiding, a high pressurizer pressure, and opening of the PORVs. Again, the likelihood of a stuck open PORV is increased significantly. MINIMIZATION OF TRANSIENT SHIFTS It is important that the operation and maintenance of nuclear plants be carried out so as to ensure that the frequencies which have been assigned to these various categories of transients are not exceeded. As noted, the shifting of transients to a higher frequency of occurrence can be caused by a variety of actions.

We have shift technical advisors ready at hand with special engineering and accident analysis training. We have a developing field of transient management. Those are all good things in the "plan ahead" department. The new emergency operating procedures, once shaken down and understood, provide a much better prescription for what to do in a transient than the old procedures. And with better operator training, with the technical advisors at hand, with transient management concepts, shift crews are much better prepared to use the emergency procedures correctly.

27 REFERENCES (1) (2) (3) {4) (5) (6) 28 G. Kemeny, et al (Report of the President's Commission on the Accident at Three Mile Island, USGPO, October 1979. E. Zebroski, P. Wilkinson, and S. Rosen, American Power Conference Proceedings, Vol. 45, 1983 (in press) S. Levy, Second International Topical Meeting on Nuclear Reactor Thermal-Hydraulics, Santa Barbara, January 11-14, 1983 Energy Research Advisory Board, Draft Report (Summary in Inside NRC, September 19, 1983, p. 10) INPO Report 82-025, Review of Report on Precursors to Potential Severe Core Damage, September 1982 EPRI Report NP-2230, January 1982, ATWS: A Reappraisal, Part 3, prepared by SAI.

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