MEETING MINUTES
ANS-19.10 Fast Neutron Fluence in Reactor Cavities
Omni Shoreham Hotel
2500 Calvert Street, NW, Washington,
D. C.
November 17, 2002
The twenty-second meeting of
ANS-19.10 was convened at 10:00 a.m. on Sunday, November 17, 2002. Seven committee members and Suriya Ahmad of
the ANS were in attendance. The names,
affiliations, e-mail addresses, and fax and phone numbers of the attendees are
given in Attachment-I.
Chairman L. Lois welcomed the
Committee members and expressed appreciation for the continued interest and
contributions to the Standard. He asked
that Committee members who are providing contributions to provide them on a
diskette, preferably in WordPerfect format.
The Committee unanimously approved
the minutes for the previous June 9, 2002, Hollywood, FL meeting.
The Chairman provided a summary and
status of the Standard and noted that, while substantial progress has been made,
there are still a substantial number of modifications and updates that will be
required to bring the Standard into a form consistent with the format and
content of typical reactor physics standards.
The Chairman noted that ANS-19 has
requested that the level of detail be reduced and the format be shortened. He distributed a new “working draft” in
which the detail had been reduced substantially, and which he considers a major
step towards this goal. He noted that
additional modifications are necessary and asked for additional comments from
the Committee members. He specifically noted that additional references are
required.
The Chairman stated that we may want
to add an appendix where additional detail could be included. J. Adams asked if the appendix would be
published with the Standard because the preparation of the appendix will take
additional time and will result in a major delay in the publication of the
standard. S. Ahmad stated that the
appendix would be attached to the Standard and would be published at the same
time. The Committee agreed that the
addition of an appendix would result in an unacceptable delay, and unanimously
recommended that an appendix not be added.
B. Petrovic asked if, in
Section-1.2, the term “procedure” is appropriate since we are not providing a
detailed procedure. J. Adams suggested
that the term procedure be replaced with “guidance,” and the Committee
agreed. J. Adams asked if ANS would
provide an editor, and S. Ahmad stated
that she would have ANS edit the Standard.
J. Carew stated that the assumption,
before Section 4.2.1, that the modeling and detector location uncertainties are
negligible is incorrect. The Committee
agreed and he offered to provide the necessary changes.
S. Anderson asked if the approval of
the Standard requires a unanimous vote.
S. Ahmad stated that a
two-thirds majority is required. S.
Ahmad stated further that the appendix would be voted on at the same time as
the Standard.
S. Anderson noted that in the scope
we are confined to the active fuel region and a user may want to apply the
methods above and below this region. J.
Carew noted that application of these methods outside this region raises
additional questions that are not presently addressed in the Standard, and
suggested that we don’t change the wording.
J. Wagner asked if we should limit
the Standard to the fast fluence. L.
Lois noted that the methods presently included in the Standard are not strictly
applicable to the thermal fluence calculation and will require substantial
modification. S. Anderson added that
the calculation of the thermal fluence of the bolts in PWRs is definitely not
as accurate as the fast fluence prediction.
Y. Orechwa noted that expanding the
scope raises many new issues that are not easily addressed and suggested that
the present scope be retained. The
Committee agreed unanimously.
J. Carew stated that the “step
function” wording in Section-2.5 should be replaced with a less mathematical
description.
L. Lois asked if we need an
additional reference for the Least-Squares method in Section-4.2.3. S. Anderson
stated that the ASTM Standard E-944 should be referenced. Y. Orechwa asked if there is a manual for
Least-Squares applications. S. Anderson
stated that he would try to identify an additional reference. He noted further that he could provide a
reference for an alternate method to Least-Squares. The Committee agreed that this should be added.
L. Lois requested that the Committee
provide additional comments and the
required references.
S. Ahmad asked that all equations be
checked carefully.
L. Lois asked if a preamble is
required and, after some discussion, it was decided that a preamble is not
necessary.
Chairman Lois thanked all present
for their continued efforts and adjourned the meeting at approximately 12:00
noon.
ATTACHMENT - 1
ATTENDANCE ANS 19.10
November 17, 2002
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Adams, James |
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NIST |
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P 301-975-6205 adams@nist.gov |
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Ahmad, Suriya |
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ANS |
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P 708-570-8269 F 708-352-6464 Sahmad@ans.org |
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Anderson, Stanley |
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Westinghouse |
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P 412-374-5165 F 412-374-5099 ANDERSSL@WESTINGHOUSE.COM |
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Carew, John |
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BNL |
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P 631-344-2595 F 631-344-1430 Carew@bnl.gov |
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Lois, Lambros |
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U.S. NRC |
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P 301-415-3233 F 301-415-3577 Lxl1@nrc.gov |
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Orechwa, Yuri |
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NRC |
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P 301-415-1057 F 301-415-3577 yxo@nrc.gov |
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Petrovic, Bojan |
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Westinghouse |
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P 412-256-1295 F 412-256-2444 yxo@nrc.gov |
ATTACHMENT - 1
ATTENDANCE ANS 19.10
November 17, 2002
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Wagner,J |
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ORNL |
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P 865-241-3570 F 865-576-3513 Wagnerjc@ornl.gov |