PPAC-Commitment-BL1A_YB

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26 Νοε 2013 (πριν από 3 χρόνια και 4 μήνες)

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PROJECT/
COMMITMENT TITLE
:


BL1A refurbishment




PROPONENT:

R. Ruegg



TRIUMF CONTACT:



R. Ruegg


PRINCIPAL COLLABORATORS:
P. Bricault, G. Minor, Y. Bylinski, A. Trudel, S. Kreitzman,
I. Earle, D. Preddy, D. Yosifov, C. Ball
ard, G. Clark

PROJECT

DESCRIPTION:


Beam line 1A (BL1A) delivers protons from the 500 MeV cyclotron to multiple users in
the Meson Hall. Majority of users have their experimental stations on the secondary
channels
where muons are fed from two production t
argets T1 & T2. At the far east end
of BL1A there is a 500 MeV irradiation facility used for isotope production followed by
the Thermal Neutron Facility (TNF) that serves also as a beam dump. Users from
industry irradiate their samples (mostly electronic m
odules) at the TNF.

BL1A infrastructure is over 35 years old. There was a flaw in the original design: the
immediate shielding around T1 & T2 was made of a heavy concrete comprising an iron
ore aggregate.

Over the years BL1A components have been seeing mul
tiple water leaks
in the deteriorating cooling system. Water caused severe swelling of the heavy concrete
due to chemical reactions of the iron oxidation. This in tern has lead to a compromise of
the structural integrity of the beam line components. The va
cuum joints between T2
and connected to it beam lines (both primary and secondary) have been affected the
most. Components misalignment in these joints developed beyond the flexibility
allowed by their design and caused vacuum leaks. Numerous attempts to f
ix the leaks by
modifying the joints components were only partially successful. After a few latest
repairs of the T2/M9 joint it has become evident that applied technology has reached its
limit and cannot be relied on any more. A multi
-
stage approach has t
o be developed to
resolve the issue and ensure reliable beam delivery to all meson hall users.

I general terms there
c
ould be 3 phases in BL1A refurbishing.

Phase 1.

Sacrifice M9 channel
by blanking off its T2 port. This will allow much more reliable
beam

delivery to the rest of the Meson Hall users. A consideration may also be given to
application of an elastomer seal instead of indium seal to fix the
T2/M9
vacuum leak.
If
elastomer seal will survive one year radiation exposure then it could be replaced d
uring
winter shutdown.
This assume
s

that 3
-
4 weeks of dedicated personnel shall be allocated
to this job every shutdown until a better solution is realized.

Phase 1 does not require
additional resources and shall be implemented in the current 5YP (2010
-
201
5).

Phase 2.

Replace M9
and M20
front end quadrupole magnet
s

(
Q1
)

with modified unit
s

that will
incorporate adjusted/redesigned vacuum joint mechanism to match T2 port
s

in the
presence of distorted alignment. Ideally the radiation hard triplet Q14/15/16 sh
ould
Date:

22
-
Sep
-
2012

Proposa
l for TRIUMF Co
mmitment

(5YP 2015
-
2020)


also be replaced
with redesigned unit
during this intervention.

This action still cannot
guarantee T2 monument (vessel) stability as it is sitting on
a

s
imilar

crumbling concrete
pedestal.
Secondary channels upgrade
(Q1’s)
is described in details in t
he CMMS
proposal and not evaluated in this submission.

Phase 3.

T2 monument will have to be disposed as it is extremely radioactive and thus its
reinstallation and realignment would lead to prohibitively high radiation exposure to
the personnel and very sl
ow progress with setup due to protective measures enormous
overhead. All heavy concrete blocks will have to be removed and replaced with regular
concrete. With this dramatic overhaul all BL1 infrastructure will have be
renovated/upgraded: water cooling cir
cuits, cables, questionable vacuum joints,
vacuum pumps, magnet power supplies, and their controls. A new design of T2 target
station should be considered: ARIEL target station technology seems to be an
appropriate modern approach to such a facility. A new

remote hand
-
able vacuum seal
design (i.e. pillow seal) shall be exercised
, that will require a dedicated development
and test facility
.

Associated Meson Hall hot cell may also require an upgrade to
accommodate all newly implemented components that may req
uire remote handling
service off line.
Phase 3 is a massive undertake: it will require substantial design effort,
careful preparation and lengthy installation time (up to one year). Problem of heavy
and bulky radioactive waste disposal will have to be prop
erly addressed.
The disposal
will constitute a substantial part of the project’s budget.
This
BL1A
upgrade may open a
window of opportunity of adding new facility(s) as a proton beam user (i.e. a b
eta
-
NMR
target station and a secondary channel
could be pos
sibly installed downs
tream of T
2).

This virtual facility expansion has to be reviewed by the scientific community and is
outside the scope of current proposal.

At this time resources estimates are very uncertain for both manpower and money. A
conceptual s
tudy should take place in 2012
-
2013 that will allow better evaluation od
the scope of job and requirements for this proposal.



SCIENTIFIC JUSTIFICATION
:

All
μSR and CMMS program are entirely dependant on reliable beam delivery down
BL1A. Recently M20 and M9 secondary channels have been fully rebuilt to enhance their
scientific productivity. A scientific community continually exhibit high demand for the
beam ti
me in all muon channels. Moreover M9B channel represents a unique facility
providing required muon spin rotation unlike any competing installations in other labs.



RELATIONSHIP TO BROADER CANADIAN RESEARCH COMMUNITY
:




BROADER IMPACTS
:


The
500 MeV irrad
iation facility
and TNF successfully serve

industr
ial users. This
broadens TRIUMF’s users base, raises lab’s profile and brings commercial revenues that
supports new developments and stabilizes TRIUMF’s budget.



MAJOR MILESTONES:

Description

Date

M20 & M
9 Q1’s and BL1A triplet fabrication

㈰ㄵ

P桡獥′⁣潭灬e瑥t

㈰ㄶ⁷楮瑥2⁳桵 摯睮

Pillow seal development and prototyping

2016

New T2 design

2016
-
2017

Radioactive storage design

2017

T2 fabrication

2018

Radioactive storage construction

2018

BL1A infr
astructure upgrade design

and procurement

2018

New hot cell design

2019

BL1A upgrades installation

2019

Hot cell upgrade

2020 winter shutdown


RESOURCE REQUIRMENTS:

CASH FLOW REQUIREMENTS


\
YEAR

SOURCE
\

ONE

TWO

THREE

FOUR

FIVE

TO
TAL


TRIUMF








EXTERNAL








TOTAL

0.5 M$

0.5 M$

2
.0 M$

2.0 M$

2.0 M$

7
.0

M$

TRIUMF NON
-
CASH RESOURCES


\
YEAR

RESOURCE
\

ONE

TWO

THREE

FOUR

FIVE

TOTAL


3

4

6

8

10

31

person
years






























EXTERN
AL FUNDING INFORMATION:




ONGOING
OPERATIONAL REQUIREMENTS:


All installations
will require BL1A
shu
tdown
.
Other users, including UCN, will be
provided

with proton
beams from the cyclotron
.



DECOMMISSIONING REQUIREMENT:

Many
radioactive components will be decommissioned and replaced. A large scale radioactive storage will
have to be constructed on site. Some components can be disposed off site.



Accepted:





Date: