Spectrum measurements and calculations in the epithermal neutron beam at the FiR 1 BNCT facility

Tom Seren, Iiro Auterinen, Tiina Seppälä, Petri Kotiluoto

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

After a period of intense planning, building and scientific activity by a multi-disciplinary team from VTT Chemical Technology, Helsinki University, Helsinki University Central Hospital and the Radiation and Nuclear Safety Authority (STUK) an epithermal Boron Neutron Capture Therapy (BNCT) treatment facility for malignant brain tumours has been established at the FiR 1 TRIGA Mark H reactor in Espoo, Finland [1]. A crosssection of the epithermal beam, including the reactor core and the FLUENTALtm moderator, is shown in Fig. 1. In the first stage (1996) the thickness of the moderator was 75 cm. Calculations and measurements with this configuration showed that the neutron field was of very good quality with a very small contamination of fast neutrons [2, 9]. However, in order to increase the intensity and reduce treatment times the thickness of the moderator was reduced to 63 cm in the final configuration (November 1997, shown in Fig. 1), despite a somewhat higher anticipated fast flux component. The aperture diameter is adjustable from 8 cm to 20 cm in 3 cm steps by adding and removing Li-poly plates. Naturally, the neutron field in the treatment beam must be characterised as well as possible. An accurate knowledge of the source neutron spectrum in the BNCT beam is essential for treatment planning and for in-phantom calculations and measurements. For that purpose extensive calculations and measurements have been performed at several locations, both for a true "free beam" configuration and with a water phantom at the exit aperture.
Original languageEnglish
Title of host publication15th European TRIGA Conference
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Pages167-179
ISBN (Print)951-38-5273-3
Publication statusPublished - 2000
MoE publication typeA4 Article in a conference publication
Event15th European TRIGA Conference - Espoo, Finland
Duration: 15 Jun 199817 Jun 1998

Publication series

NameVTT Symposium
PublisherVTT
Number197
ISSN (Print)0357-9387
ISSN (Electronic)1455-0873

Conference

Conference15th European TRIGA Conference
CountryFinland
CityEspoo
Period15/06/9817/06/98

Fingerprint

neutron beams
moderators
therapy
boron
neutrons
planning
configurations
apertures
reactor cores
Finland
neutron spectra
fast neutrons
brain
safety
contamination
tumors
reactors
radiation
water

Cite this

Seren, T., Auterinen, I., Seppälä, T., & Kotiluoto, P. (2000). Spectrum measurements and calculations in the epithermal neutron beam at the FiR 1 BNCT facility. In 15th European TRIGA Conference (pp. 167-179). Espoo: VTT Technical Research Centre of Finland. VTT Symposium, No. 197
Seren, Tom ; Auterinen, Iiro ; Seppälä, Tiina ; Kotiluoto, Petri. / Spectrum measurements and calculations in the epithermal neutron beam at the FiR 1 BNCT facility. 15th European TRIGA Conference. Espoo : VTT Technical Research Centre of Finland, 2000. pp. 167-179 (VTT Symposium; No. 197).
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abstract = "After a period of intense planning, building and scientific activity by a multi-disciplinary team from VTT Chemical Technology, Helsinki University, Helsinki University Central Hospital and the Radiation and Nuclear Safety Authority (STUK) an epithermal Boron Neutron Capture Therapy (BNCT) treatment facility for malignant brain tumours has been established at the FiR 1 TRIGA Mark H reactor in Espoo, Finland [1]. A crosssection of the epithermal beam, including the reactor core and the FLUENTALtm moderator, is shown in Fig. 1. In the first stage (1996) the thickness of the moderator was 75 cm. Calculations and measurements with this configuration showed that the neutron field was of very good quality with a very small contamination of fast neutrons [2, 9]. However, in order to increase the intensity and reduce treatment times the thickness of the moderator was reduced to 63 cm in the final configuration (November 1997, shown in Fig. 1), despite a somewhat higher anticipated fast flux component. The aperture diameter is adjustable from 8 cm to 20 cm in 3 cm steps by adding and removing Li-poly plates. Naturally, the neutron field in the treatment beam must be characterised as well as possible. An accurate knowledge of the source neutron spectrum in the BNCT beam is essential for treatment planning and for in-phantom calculations and measurements. For that purpose extensive calculations and measurements have been performed at several locations, both for a true {"}free beam{"} configuration and with a water phantom at the exit aperture.",
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Seren, T, Auterinen, I, Seppälä, T & Kotiluoto, P 2000, Spectrum measurements and calculations in the epithermal neutron beam at the FiR 1 BNCT facility. in 15th European TRIGA Conference. VTT Technical Research Centre of Finland, Espoo, VTT Symposium, no. 197, pp. 167-179, 15th European TRIGA Conference, Espoo, Finland, 15/06/98.

Spectrum measurements and calculations in the epithermal neutron beam at the FiR 1 BNCT facility. / Seren, Tom; Auterinen, Iiro; Seppälä, Tiina; Kotiluoto, Petri.

15th European TRIGA Conference. Espoo : VTT Technical Research Centre of Finland, 2000. p. 167-179 (VTT Symposium; No. 197).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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T1 - Spectrum measurements and calculations in the epithermal neutron beam at the FiR 1 BNCT facility

AU - Seren, Tom

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AU - Seppälä, Tiina

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PY - 2000

Y1 - 2000

N2 - After a period of intense planning, building and scientific activity by a multi-disciplinary team from VTT Chemical Technology, Helsinki University, Helsinki University Central Hospital and the Radiation and Nuclear Safety Authority (STUK) an epithermal Boron Neutron Capture Therapy (BNCT) treatment facility for malignant brain tumours has been established at the FiR 1 TRIGA Mark H reactor in Espoo, Finland [1]. A crosssection of the epithermal beam, including the reactor core and the FLUENTALtm moderator, is shown in Fig. 1. In the first stage (1996) the thickness of the moderator was 75 cm. Calculations and measurements with this configuration showed that the neutron field was of very good quality with a very small contamination of fast neutrons [2, 9]. However, in order to increase the intensity and reduce treatment times the thickness of the moderator was reduced to 63 cm in the final configuration (November 1997, shown in Fig. 1), despite a somewhat higher anticipated fast flux component. The aperture diameter is adjustable from 8 cm to 20 cm in 3 cm steps by adding and removing Li-poly plates. Naturally, the neutron field in the treatment beam must be characterised as well as possible. An accurate knowledge of the source neutron spectrum in the BNCT beam is essential for treatment planning and for in-phantom calculations and measurements. For that purpose extensive calculations and measurements have been performed at several locations, both for a true "free beam" configuration and with a water phantom at the exit aperture.

AB - After a period of intense planning, building and scientific activity by a multi-disciplinary team from VTT Chemical Technology, Helsinki University, Helsinki University Central Hospital and the Radiation and Nuclear Safety Authority (STUK) an epithermal Boron Neutron Capture Therapy (BNCT) treatment facility for malignant brain tumours has been established at the FiR 1 TRIGA Mark H reactor in Espoo, Finland [1]. A crosssection of the epithermal beam, including the reactor core and the FLUENTALtm moderator, is shown in Fig. 1. In the first stage (1996) the thickness of the moderator was 75 cm. Calculations and measurements with this configuration showed that the neutron field was of very good quality with a very small contamination of fast neutrons [2, 9]. However, in order to increase the intensity and reduce treatment times the thickness of the moderator was reduced to 63 cm in the final configuration (November 1997, shown in Fig. 1), despite a somewhat higher anticipated fast flux component. The aperture diameter is adjustable from 8 cm to 20 cm in 3 cm steps by adding and removing Li-poly plates. Naturally, the neutron field in the treatment beam must be characterised as well as possible. An accurate knowledge of the source neutron spectrum in the BNCT beam is essential for treatment planning and for in-phantom calculations and measurements. For that purpose extensive calculations and measurements have been performed at several locations, both for a true "free beam" configuration and with a water phantom at the exit aperture.

M3 - Conference article in proceedings

SN - 951-38-5273-3

T3 - VTT Symposium

SP - 167

EP - 179

BT - 15th European TRIGA Conference

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Seren T, Auterinen I, Seppälä T, Kotiluoto P. Spectrum measurements and calculations in the epithermal neutron beam at the FiR 1 BNCT facility. In 15th European TRIGA Conference. Espoo: VTT Technical Research Centre of Finland. 2000. p. 167-179. (VTT Symposium; No. 197).