ORNL-TM-7207 - the Molten Salt Energy Technologies Web Site

38
Table 22. Kinetic response of BMSR
FIQW Flow reactivity Ne t IieactQr
constant, w %oss, $ - A reactivity, A period, I/@
(8-9 (dollbar S) (dollars 1 %SI
0
0
0
6
0
0
6
0
0.0515
0.0515
0.0515
6.8515
0.051 5
0.0515
0.851 5
0,0515
0
0
0
0
0
0
0
0
0.23
0.23
0. 23
0.23
0.23
8*23
0.23
0.23
6
8.11
0.26
6.45
8*69
Q. 92
1.28
2,04
0
0.87
0.16
0.29
0*40
0.78
1.05
1.82
BD
100
30
110
a
1
8.3
0. P
OD
31 80
20
10
3
1
0.3
0.6
delayed-neutron data. ’’ re flow c~~lstant 0.0515 s-l corresponds to full-power ope ratio^ with a rr~ea~ fuel residence time ~f 19.4 s in the
CQ%@ e
‘~hese data sthow that less excess ~ea~tivity is required ~ O P a given
small power response when the salt is flowing. This reactivity difference
becomes constant at higher reactivftfes. Because of the very PSI^ genera-
tion time, the response to net reactivity changes of more than l dollar
would be much smaller than that of many reactor types, which is characteristic
of over-moderated graphite assemblies. The overall result would be
a system with a power level that fluctuates more than usual because of inherent
operating noise but that would be relatively easy to shut down by
CoIltPOl rad aC%iOn iR an Unplanlled eVeIlt. Power f%uCtUatiQRs Would ’be expected
to have little effect on the exter~al system because of the large
heat Capacity O f the Cor@ atad the low flow %pate.