Fission Product Containment

The fission products contain some 50 elements located in the middle part of the periodic system. Some of the fission products are produced in considerable amounts, though their radioactivity is rather low [71], and they were therefore thought to have a potential value on the mineral market. [Pg.545]

An acid solution of fresh fission products contains 0.8 g l cerium as Ce. The y-flux in the solution corresponds to 520 GBq 1 of an average energy of 0.7 MeV. If half of the y-flux is absorbed in the solution, what fraction of cerium is reduced to Ce in 24 h Assume the same G-value as in Figure 7.7. [Pg.190]

A mixture condenser of the indicative volume of about 1500 m, of which 500 m are initially occupied by borated water at 2000 ppm boron and the rest by nitrogen. The function of this component is the collection of the fluid discharged by the primary system and the confinement of the fission products contained in it, the dissipation of its thermal energy to the outside environment and the formation of an additional reserve of water for the long-term cooling of the core, that is beyond the 10 hours (by natural or forced circulation, using the low power pumps, according to the... [Pg.357]

The situation for the AHTR, shown in Fig. 4.2, has the potential to be more favorable. The molten salt coolant offers additional fission product containment features and may reduce some licensing barriers. Key features are the low-pressure coolant and gas-trapping system and the retention of the most important radiotoxic fission products in the salt. With a low-pressure coolant, a true containment building is a more practical option than for a high-pressure, gas-cooled system. [Pg.65]

Design Basis Fission product containment Containment of PS type containment spray condensation pool cooling passive active active The surrounding reactor building serves as a secondary containment, kept at a below-atmospheric pressure, ventilation exhaust air passes through filters... [Pg.55]

Design Basis Fission product containment Clad Passive Fist barrier of defense... [Pg.76]

Fission product containment Flooded com. Passive FP sparging within the water that quench the PC. [Pg.76]

Design basis Fission product containment Containment vessel passive Pressure suppression type with mmimum penetrations... [Pg.102]

Fission product containment Containment Passive Leak tight design... [Pg.102]

Design Basis Fission Product containment Clad Primary Circuit Containment/Containment Spray System Passive Passive Passive/Active ... [Pg.120]

Design Basis Fission product containment Primary circuit Guard vessel Containment Passive Passive Passive ... [Pg.135]

Fission product containment 1 Fuel clad/sheath 2 Heat transport system pressure boundary 3 Containment envelope P Multiple bamers to release with m-servace inspection mcludmg activi release from fuel, pressure tube leak-bef(xe-break and on-lme detection of leak rate from contamm t... [Pg.172]

Fission product containment 1 From intact pressurized containment leakage over many days. 2 Optionally, long term use of filtered air discharge system 1 P 2 A 1 The containment leakage rate is mamtamed withm acceptable limits, 2 The engineered FAD doesn t have the capacity of an Emergency FAD, but can be used at moderate pressure and activity levels... [Pg.173]

Fission product containment CS Passive/ Active 1 containment leakage rate is mamtamed withm acceptable Imiits 2 Kidney filtration contams lodme and particulate activity 3 Secondary contamment at negauve pressure through filtered purge... [Pg.217]

Fission product containment Containment passive Inclosed m Secondary containments... [Pg.263]

Fission product containment Pressure suppression pool Passive... [Pg.280]

DESIGN BASIS Fission product containment Claddmg Pnmary circuit Containment passive passive passive ... [Pg.294]

Fission product containment Water filled containment passive Flood containment... [Pg.294]

Fission product containment PSRMS/Contamment Passive ... [Pg.310]

Fission product containment Containment Flooded RPV leak Passive Passive Flooding of drywell out of core floodmg iiool... [Pg.365]

Fission product containment Contaimnent Passive Pressure suppression type... [Pg.398]

Fission product containment Intermediate pool and reactor pool Containment Passive (A) Passive (A) Scrubbing effect provides sigmfioant decontammation factor No containment pressurization is possible... [Pg.447]

Fission product containment Water-filled, pressunsed containment Passive Relevant, additional obstacle to core degradation (avoids LOCAs additional coolant solidifies conum). additional fission products container... [Pg.478]

Design Basis Fission product containment Double clad/PC/GV+Cont P/P/P Double clad fuel pins with low power density ensure good safety barrier... [Pg.497]

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