From: owner-ammf-digest@smoe.org (alt.music.moxy-fruvous digest) To: ammf-digest@smoe.org Subject: alt.music.moxy-fruvous digest V14 #5194 Reply-To: ammf@fruvous.com Sender: owner-ammf-digest@smoe.org Errors-To: owner-ammf-digest@smoe.org Precedence: bulk alt.music.moxy-fruvous digest Tuesday, October 27 2020 Volume 14 : Number 5194 Today's Subjects: ----------------- Compare Affordable Health Options in your Area ["Obamacare-Health-Plans" ] ---------------------------------------------------------------------- Date: Tue, 27 Oct 2020 10:16:51 -0400 From: "Obamacare-Health-Plans" Subject: Compare Affordable Health Options in your Area Compare Affordable Health Options in your Area http://cascope.today/hyY45jY6znwodOL1vqiMngcomaUI3_qxkgnFG5ObnJgnww8q http://cascope.today/XOuJlO9FTbvFyKkB_28tNTKV7zLsHvTVtQw-2bdaDlkFGDUX within nanoseconds (an average time interval used by scientists in the Manhattan Project was one shake, or 10 nanoseconds). A small additional source of neutrons is the fission products. Some of the nuclei resulting from the fission are radioactive isotopes with short half-lives, and nuclear reactions among them release additional neutrons after a long delay of up to several minutes after the initial fission event. These neutrons, which on average account for less than one percent of the total neutrons released by fission, are called delayed neutrons. The relatively slow timescale on which delayed neutrons appear is an important aspect for the design of nuclear reactors, as it allows the reactor power level to be controlled via the gradual, mechanical movement of control rods. Typically, control rods contain neutron poisons (substances, for example boron or hafnium, that easily capture neutrons without producing any additional ones) as a means of altering k-effective. With the exception of experimental pulsed reactors, nuclear reactors are designed to operate in a delayed-critical mode and are provided with safety systems to prevent them from ever achieving prompt criticality. In a delayed-critical assembly, the delayed neutrons are needed to make k-effective greater than one. Thus the time between successive generations of the reaction, T, is dominated by the time it takes for the delayed neutrons to be released, on the order of seconds or minutes. Therefore, the reaction will increase slowly, with a long time constant. This is slow enough to allow the reaction to be controlled with electromechanical control systems such as control rods, and as such all nuclear reactors are designed to operate in the delayed-criticality regime. ------------------------------ End of alt.music.moxy-fruvous digest V14 #5194 **********************************************