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8 DMSR, the shutd~wn residual-heat-remova1 (RHR) probPem would be Less severe than in the MSBR. Consequently, a less elaborate RHR system than would be needed for an MSBR might be acceptable for a DMSR. However, for purposes of characterizing the DMSK, the assumption was that the balance- of-plant would be the same as that for an EISBW, 2.4 Fuel Randline and Processing The performance of an MSBR wouEd be strongly dependent the avail- ability of an on-site continuous chemical-processing facility for removal of fission products and isolation of protactinium on relatively short time cycles, These treatments would make possible the achievement of a posi- tive 233U breeding gain in a system with a low specific fissile inven- tory. Because a DPfSR on a 30-year fuel cycle would not require even nomi- nal break-even breeding and because a significantly higher fissile inven- tory could be tolerated, the processing requirements for a DMSR would be much less stringent than for an MSBR. Isolation of protactinium would be avoided for proliferation reasons, and chemical processing to remove €is- sion products could be avoided without severe performance penalties. Despite these concessions, some fission-product removal would take glace in any PISR. Most of the rare gases (and some other volatile fission products) would be removed by the gas-sparging system in the primary circuit. ~n addition, a substantial fraction of the noble-metal" fission products would be expected to plate out on metal surfaces where they would not affect the neutronic performance. However, the reference-design reductive-extraction/me~~~-t~~~s€~~ process would not be involved. Although there would be no chemical processing for fission-product removaih, the DMSR likely would require a hydrofEuorination system for occasional (presumably batchwise) treatment of the salt to rem~ve oxygen contaminatione Ira addition, because a BMSR would requfre routine additions of fissile fuel, as well as additions of other materials necessary to keep the fuel-salt chemical composition in proper balance, a chemical Nobility is defined here in relation to the U4+/lJ3+ redox potential * (see Sect. 3.3.2).
addition StathQR would be required. The %eChnOlogy for both Of these 9 operations is well established and was extensively demonstrated in the molten-salt reactor experiment (MSWE). These and other aspects of the DMSR fuel chemistry are treated in greater detail in a later s ~tion.
Page 1: i *w . . I
Page 5 and 6: P iii CONTENTS ....................
Page 7 and 8: CONCEPTUAL DESIGN CHARACTERISTICS O
Page 9 and 10: 3 The primary purpose of this study
Page 11 and 12: .. .... . w..w c Y ... . r 5 2. GEN
Page 13: ii.... :.: ..... .,. \ ..... %& . 3
Page 17 and 18: !I \.... . , . ~ .... .. . . / I I
Page 19 and 20: ... .. ...... . . . $i 13 Table 1.
Page 21 and 22: 15 Initial scoping studies showed t
Page 23 and 24: .. . E 6> I S N 0.45 k- 0.50 B --.
Page 25 and 26: :.:..y ,. . . w, E9 The code calcul
Page 27 and 28: h 3. Additional 238Y is added as re
Page 29 and 30: ...z,y .. . c .A, Table 9. Actinide
Page 31 and 32: ';x.w' .... Relative power distribu
Page 33 and 34: ........ . . . :..i 27 a Inner 2.54
Page 35 and 36: 29 Table 16. Effect of neutron spec
Page 37 and 38: ob E 2 a 4 5 6 7 8 9 10 11 12 13 14
Page 39 and 40: .. . . . . . . . . . 'a# 0.1 0.2 0.
Page 41 and 42: 35 (Doppler effect), (2) changing t
Page 43 and 44: where Ci = relative delayed-neutron
Page 45 and 46: .... . . . . , c.y..p c "
Page 47 and 48: .... :...w . . . . . :, %. , dimens
Page 49 and 50: ,. ::.y ~. . .... , 40 0 43 1 2 3 4
Page 51 and 52: .,.,. . . ., , .. . . . . . . . %..
Page 53 and 54: .... ... . ....... . .%.W 3.3.1.1 C
Page 55 and 56: 49 Variation of fuel composition wi
Page 57 and 58: .. .*,p. . . . . . . . Table 25. Ph
Page 59 and 60: ;: c.... x. . w ..i 53 Table 26, St
Page 61 and 62: would be expected to have an equili
Page 63 and 64: .... . . . . :i ,.*,&s 57 Corrosion
Page 65 and 66:
. ;;..,..I . . . . . . "LW 0 9 m -
Page 67 and 68:
of the fissioned atom. ea ~arly ass
Page 69 and 70:
63 n e results of a program of solu
Page 71 and 72:
65 Table 27. Sources and rates Sf p
Page 73 and 74:
operation of the PISRE. 67 analyses
Page 75 and 76:
UP3/UF4 ratio would be possible. DM
Page 77 and 78:
$ .p9 3.3.3.1 Preparation of initia
Page 79 and 80:
73 Contamination of fuel by seconda
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*w- through the walls of the primar
Page 83 and 84:
77 4 will apparently be necessary (
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such contamination. For a demonstra
Page 87 and 88:
8% 3.4 Reactor Materials Although s
Page 89 and 90:
: ....., . .’ -. ..WY used in the
Page 91 and 92:
..... i.. ....., . .Yd 85 QRPIL-DWG
Page 93 and 94:
... w . . .y and to salt containing
Page 95 and 96:
With the different ~Bjectives of ns
Page 97 and 98:
t.;$- ... quite different from thos
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93 during noma1 operation. Minor am
Page 101 and 102:
............. . . .. . .=w as SSm,
Page 103 and 104:
. . . :.w . . . . , 4. ALTERNATIVE
Page 105 and 106:
.. . ... . . . . . . .. . . "W 3. T
Page 107 and 108:
.,.. w .." by removing some uranium
Page 109 and 110:
, . . . . . . , -c%w probably still
Page 111 and 112:
and the ~ dvent (or carrier) salt a
Page 113 and 114:
BO 7 TPle fuel makeup requirements
Page 115 and 116:
5. CQPIPIERCIWLPZATION CONSIDERATIO
Page 117 and 118:
11% At the close of MSRE operation,
Page 119 and 120:
12YS 75 22”” 955 30” 1””
Page 121 and 122:
115
Page 123 and 124:
aa 7 some components in common with
Page 125 and 126:
Ae eo un t No * Table 3%. Capital c
Page 127 and 128:
- ,.,.,.,., p .. ..... . G is based
Page 129 and 130:
123 Table 34. Summary of annual non
Page 131 and 132:
...... . . . . ., x.:w* 4 i.. ... _
Page 133 and 134:
E2 7 There are no detailed estimate
Page 135 and 136:
129 particularly if such activities
Page 137 and 138:
. ~.........* . . . . . :*. ... . -
Page 139 and 140:
. .. . . . . . . . ;.:w b 133 the i
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_... ..&/ ; .; with reactor scram m
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137 includlng $900 million for the
Page 145 and 146:
139 The authors want to acknowledge
Page 147 and 148:
. ... . .,.,.,.,.,. . , i.rc- q....
Page 149 and 150:
.:. _.i .. ..... -.=* 45. A. L. Mat
Page 151 and 152:
...... &;.& 3 14 5 74. W, R. Grimes
Page 153 and 154:
p 103. 6. Re Hudson 11, CQNCEPT-5 U
Page 155:
... . . . . . . . , . ,.Y&fl 149 ap
Page 158 and 159:
Account No. -0- Three- digit digit
Page 160 and 161:
.... ..
Page 162:
156 77. He 6. MacPherson, Institute
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