Re: Calculating doses in ducts or labyrinths

[Martin_Haas@notes.ymp.gov]

Another reference that may be of interest relates to the use of MCNP4A.
The following paper, to be presented in May at the International High-Level
Rad Waste Conf., essentially benchmarked the use of the code against
available data for both neutron and photon scattering.

"Validation of MCNP4A for Repository Scattered Radiation Analysis", by M.
Haas and S. Su

From: marrtin_haas@notes.ymp.gov





tayloe@ibm.estd.battelle.org on 12/24/97 08:24:26 AM

Please respond to radsafe@romulus.ehs.uiuc.edu

To:   radsafe@romulus.ehs.uiuc.edu
cc:    (bcc: Martin Haas)
Subject:  Calculating doses in ducts or labyrinths




On Tue, 23 Dec 1997 12:54:18 Chris Hawkins <chawkins@inet.guthrie.org>
wrote regarding Linac Neutrons In Maze:
> I'm looking for comments on the 2 methods for calculating
> neutron mrem at the door to the maze in a linac room.  (NCRP
> 79 pp 52-7)
>
<snip>
>
> What are other people doing ??
We have calculated the dose reduction factors for a linac labyrinth using
the
code DCTDOS.  This IBM PC compatible code is available from the Radiation
Safety Information Computational Center at the Oak Ridge National
Laboratory
(423-574-6176) as package CCC-520 Micro.
Other papers that may be of interest are:
Tesch, K., "Attenuation of the Photon Dose in Labyrinths and Ducts at
Accelerators",
Radiation Protection Dosimetry, Vol. 20, No. 3, pp. 169-174 (1987).
Tesch, K., "The Attenuation of the Neutron Dose Equivanlent in a Labyrinth
Through
an Accelerator Shield", Particle Accelerators, Vol. 12, pp. 169-175,
(1982).
Stevenson, G.R., "Neutron Attenuation in Labyrinths, Ducts, and
Penetrations at
High-Energy Proton Accelerators", pp. 408-417, Proceedings Theory &
Practice In Radiation
Protection & Shielding, Knoxville, TN, April 22-24, 1987.
Stevenson, G.R., "Neutron Attenuation in Labyrinths, Ducts, and
Penetrations",
CERN Internal Report, TIS-RP/IR/86-07, (1986).
Goebel, K, et al, "Evaluating Dose Rates Due to Neutron Leakage Through the
Access Tunnels of the SPS", CERN Report LABII-RA/Note/75-10, (1975).
Please feel free to contact me if you have difficulty in locating these
documents.
Rob Tayloe <tayloe@battelle.org> 614-424-5796
Battelle Memorial Institute
Columbus, Ohio