You think that's bad? Consider a reactor, my reactor, were shutting it down, 100 to 0. The reactor has been operated at max percent for a long time, After shutdown, xenon 135 is no longer produced by fission and is no longer removed by burnup. The only remaining production mechanism is the decay of that dummy thicc iodine 135, which was in the core at the time I shut er' down. The only removal mechanism for this xenon, is to decay and fucc of, so when the reactor power is decreased, xenon concentration initially increases, because the xenon burnup falls to zero and the the iodine decay at 6.6 hours is faster than the the xenon decay at like 9.2 hours or so. Kk, so now my reactor, I know it very well. Like I know the rate of the increase depends on the original neutron flux and increases with increasing flux. I've even noticed at some large values of the neutron flux, peak concentration occurs at 11.3 hours after shutdown. The amount of additional negative reactivity in the xenon peak is so damm dependent, especially on original neutron flux. For my reactor shutdown from 100 to zero the amount of additional negative reactivity may reach up to 2500pcm!!!! After reaching this xenon peak, the production of xenon from iodine decay is less than the removal of xenon by decay and the concentration of xenon 135 finally decreases. After another ten half-lives (80 hours, or 700 cycles of my blender bear meme render stress test,) all the xenon undergo a beta decay, this decay causes a continuous thrusting (and I mean THRUSTING) of positive reactivity, which now must be taken into account in my subcriticality maintenance, or when approaching to criticality. I just find it appaling that the fucking xenon 135 concentration about 20 hours after shutdown from full power will be the same as the equilibrium xenon 135 concentration at full power. Thats non bueno for me, memes cannot wait forever. About 3 days after shutdown, the xenon 135 concentration will have finally decreased to a small percentage of its pre-shutdown level, and my reactor can be assumed to be xenon free. Three days of neutron poisoning, I cant stand xenon man. It's so pretentious.
Topic: I just wiped my ass with a paper towel (Read 4150 times)