Description
Abstract:A break of approximately 0.0012 m/sup 2/ in the cold leg of a B and W plant results in an interruption of natural circulation when steam accumulates in the hot-leg U-bend. A small-break loss-of-coolant accident of this size was simulated by TRAC-PF1 to evaluate strategies for recovery and for re-establishing natural circulation. In the absence of operator action, core cooling occurs when water supplied by the high-pressure-injection system boils, then is discharged through the break. Raising the steam-generator secondary level, venting steam from the steam-generator secondary, venting steam from the hog-leg U-bend, bumping the reactor-coolant pumps, and injecting a portion of the high-pressure-injection system into the hot-leg U-bend aided in cooling and depressurizing the primary system but were ineffective in re-establishing natural-circulation flows in the primary-coolant loops.
Item Description:Published through SciTech Connect.
01/01/1983.
"la-ur-83-2786"
" conf-830901-17"
"DE84001316"
Anticipated and abnormal plant transients in light water reactors conference, Jackson, WY, USA, 26 Sep 1983.
Henninger, R.J.; DeMuth, N.S.; Ireland, J.R.
Physical Description:Pages: 13 : digital, PDF file.