Zeitliche Entwicklung der Radiotoxizität

Zeitliche Entwicklung der Radiotoxizität

PUREX-Verfahren

(Plutonium and Uranium extraction)

Fizeau, 11 kt, Oberfläche

http://www.cddc.vt.edu/host/atomic/images/fizeau1b.jpg Nevada Test Site, 14.Sep.1957

Langlebige Spaltprodukte

Nuklid t

(ka) Ausbeute (%) σ (barn)

Tc-99 211 6,14 23

Sn-126 235 0,11

Se-79 480 0,04

Zr-93 1610 5,46 <4

Cs-135 2300 6,91 8,3

Pd-107 6500 1,25 1,8

I-129 15700 0,84 31

Relevante minore Aktiniden

Nuklid t

(ka) σ (barn) σ

(barn)

Np-237 2144 170 0,020

Am-241 0,432 700 3,15

Am-242m 0,141 1700 5900

Am-243 7,37 80 0,0079

Cm-242 0,00045 20 5

Cm-244 0,0181 15 1,1

Cm-245 8,5 350 2100

σ : Wirkungsquerschnitt für Neutroneneinfang (thermische Neutronen)

σ

: Wirkungsquerschnitt für Spaltung (thermische Neutronen)

MYRRHA: Multi-purpose hybrid research reactor for high-tech

applications

(Multi-purpose hYbrid Research Reactor for High-tech Applications)

SCK•CEN, the Belgian Nuclear Research Centre in Mol has been working for several years on the design of a multi-purpose irradiation facility in order to replace the ageing BR2 reactor, a multi- functional materials testing reactor (MTR), in operation since 1962.

MYRRHA, a flexible fast spectrum research reactor (50-100 MW_th) is conceived as an accelerator driven system (ADS), able to operate in sub-critical and critical modes. It contains a proton accelerator of 600 MeV, a spallation target and a multiplying core with MOX fuel, cooled by liquid lead-bismuth (Pb-Bi).

Agenda of implementation

MYRRHA will be operational at full power around 2025. During the 2010-2014 period the following items will be accomplished:

•

The
Front
End
Engineering
Design
(FEED)
and
the
associated
R&D
 programme.


•

The
licensing
process.


•

The
set‐up
of
the
international
consortium.


Construction of the facility and assembly of the components is foreseen in the period 2017-2021.

Three years (2022-2024) are foreseen for the full commissioning of the facility. The total investment cost is currently estimated at M€ 960 (€ 2009).

Der Protonenstrahl wird direkt in die Kühlflüssugkeit (Pb+Bi) geleitet, die

als Spallationsquelle wirkt.

Querschnitt durch den Reaktorkern:

Drei Positionen für Reaktionsrohre (schwarz) sind für die Spallationsquelle vorgesehen.

Die anderen können mit Brennstoff oder Abfall bestückt werden.

Transmutation von I-129 zu Xe-128

Magill et al., Appl. Phys. B 77, 387 (2003)