CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Study of Thorium-Plutonium Fuel for Possible Operating Cycle Extension in PWRs

Klara Insulander Björk (Institutionen för teknisk fysik, Nukleär teknik) ; Cheuk Wah Lau (Institutionen för teknisk fysik, Nukleär teknik) ; H. Nylén ; U. Sandberg
Science and Technology of Nuclear Installations (1687-6075). (2013)
[Artikel, refereegranskad vetenskaplig]

Computer simulations have been carried out to investigate the possibility of extending operating cycle length in the Pressurised Water Reactor Ringhals 3 by the use of thorium-plutonium oxide fuel. The calculations have been carried out using tools and methods that are normally employed for reload design and safety evaluation in Ringhals 3. The 3-batch reload scheme and the power level have been kept unchanged, and a normal uranium oxide fuel assembly designed for a 12-month operating cycle in this reactor is used as a reference. The use of plutonium as the fissile component reduces the worth of control rods and soluble boron, which makes it necessary to modify the control systems. The delayed neutron fraction is low compared with the reference, but simulations and qualitative assessments of relevant transients indicate that the reactor could still be operated safely. Differences in reactivity coefficients are mainly beneficial for the outcome of transient simulations for the thorium based fuel. A 50% extension of the current 12-month operating cycle length should be possible with thorium-plutonium mixed oxide fuel, given an upgrade of the control systems. More detailed simulations have to be carried out for some transients in order to confirm the qualitative reasoning presented.

Nyckelord: thorium, plutonium, nuclear reactor, safety

Den här publikationen ingår i följande styrkeområden:

Läs mer om Chalmers styrkeområden  

Denna post skapades 2013-02-13. Senast ändrad 2013-03-21.
CPL Pubid: 173573


Läs direkt!

Lokal fulltext (fritt tillgänglig)

Länk till annan sajt (kan kräva inloggning)

Institutioner (Chalmers)

Institutionen för teknisk fysik, Nukleär teknik (2006-2015)


Hållbar utveckling
Teknisk fysik

Chalmers infrastruktur

Relaterade publikationer

Denna publikation ingår i:

Improved PWR Core Characteristics with Thorium-containing Fuel

Thorium fuels for light water reactors - steps towards commercialization