Notice2023-00621
DNV's Petition for Phast Version 8.4 as an Alternative Model for Calculating the Vapor-Gas Dispersion Exclusion Zone
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Published
January 13, 2023
Issuing agencies
Transportation DepartmentPipeline and Hazardous Materials Safety Administration
Abstract
PHMSA is publishing this notice, a draft letter of decision, and a draft environmental assessment (DEA) to solicit public comment on a petition to authorize the use of an alternate flammable vapor-gas dispersion model. At the conclusion of the 30-day comment period, PHMSA will review the comments received from this notice as part of its evaluation to grant or deny the petition.
Full Text
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<title>Federal Register, Volume 88 Issue 9 (Friday, January 13, 2023)</title>
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[Federal Register Volume 88, Number 9 (Friday, January 13, 2023)]
[Notices]
[Pages 2387-2388]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2023-00621]
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DEPARTMENT OF TRANSPORTATION
Pipeline and Hazardous Materials Safety Administration
[Docket No. PHMSA-2021-0041]
DNV's Petition for Phast Version 8.4 as an Alternative Model for
Calculating the Vapor-Gas Dispersion Exclusion Zone
AGENCY: Pipeline and Hazardous Materials Safety Administration (PHMSA),
DOT.
ACTION: Notice.
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SUMMARY: PHMSA is publishing this notice, a draft letter of decision,
and a draft environmental assessment (DEA) to solicit public comment on
a petition to authorize the use of an alternate flammable vapor-gas
dispersion model. At the conclusion of the 30-day comment period, PHMSA
will review the comments received from this notice as part of its
evaluation to grant or deny the petition.
DATES: Submit any comments regarding the petition by February 13, 2023.
ADDRESSES: Comments should reference the docket number for the petition
request and may be submitted in one of the following ways:
<bullet> E-Gov Web: <a href="http://www.regulations.gov">www.regulations.gov</a>. This site allows the
public to enter comments on any Federal Register notice issued by any
agency. Follow the online instructions for submitting comments.
<bullet> Mail: Docket Management System: U.S. Department of
Transportation (DOT), 1200 New Jersey Avenue SE, West Building Ground
Floor, Room W12-140, Washington, DC 20590-0001.
<bullet> Hand Delivery: DOT Docket Management System: West Building
Ground Floor, Room W12-140, 1200 New Jersey Avenue SE, between 9:00
a.m. and 5:00 p.m. ET, Monday through Friday, except Federal holidays.
<bullet> Fax: 202-493-2251.
<bullet> Instructions: You should identify the docket number for
the special permit request you are commenting on at the beginning of
your comments. If you submit your comments by mail,
[[Page 2388]]
please submit two copies. To receive confirmation that PHMSA has
received your comments, please include a self-addressed stamped
postcard. Internet users may submit comments at <a href="http://www.regulations.gov">www.regulations.gov</a>.
<bullet> Note: There is a privacy statement published, go to
<a href="http://www.regulations.gov">www.regulations.gov</a>, scroll down to the bottom left to click ``Privacy
& Security Notice'' to review the statement. Comments, including any
personal information provided are posted without changes or edits to
<a href="http://www.regulations.gov">www.regulations.gov</a>.
<bullet> Confidential Business Information: Confidential Business
Information (CBI) is commercial or financial information that is both
customarily and actually treated as private by its owner. Under the
Freedom of Information Act (5 U.S.C. 552), CBI is exempt from public
disclosure. If your comments in response to this notice contain
commercial or financial information that is customarily treated as
private, that you actually treat as private, and that is relevant or
responsive to this notice, it is important that you clearly designate
the submitted comments as CBI. Pursuant to Title 49 Code of Federal
Regulations (CFR) 190.343, you may ask PHMSA to provide confidential
treatment to information you give to the agency by taking the following
steps: (1) mark each page of the original document submission
containing CBI as ``Confidential;'' (2) send PHMSA a copy of the
original document with the CBI deleted along with the original,
unaltered document; and (3) explain why the information you are
submitting is CBI. Submissions containing CBI should be sent to Ms. Kay
McIver, 1200 New Jersey Avenue SE, DOT: PHMSA--PHP-80, Washington, DC
20590-0001. Any commentary PHMSA receives that is not specifically
designated as CBI will be placed in the public docket.
<bullet> Privacy Act: DOT may solicit comments from the public
regarding certain general notices. DOT posts these comments, without
edit, including any personal information the commenter provides, to
<a href="http://www.regulations.gov">www.regulations.gov</a>, as described in the system of records notice (DOT/
ALL-14 FDMS), which can be reviewed at <a href="http://www.dot.gov/privacy">www.dot.gov/privacy</a>.
<bullet> Docket: For access to the docket to read background
documents or comments received, go to <a href="http://www.regulations.gov">www.regulations.gov</a>. Follow the
online instructions for accessing the dockets. Alternatively, you may
review the documents in person at the street address listed above.
FOR FURTHER INFORMATION CONTACT: General: Ms. Kay McIver by telephone
at 202-366-0113, or by email at <a href="/cdn-cgi/l/email-protection#3b505a42155658524d5e497b5f544f155c544d"><span class="__cf_email__" data-cfemail="e388829acd8e808a958691a3878c97cd848c95">[email protected]</span></a>. Technical: Mr.
Thach Nguyen by telephone at 909-262-4464, or by email at
<a href="/cdn-cgi/l/email-protection#75011d14161d5b115b1b12000c101b35111a015b121a03"><span class="__cf_email__" data-cfemail="0175696062692f652f6f667478646f41656e752f666e77">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION: PHMSA is evaluating a petition from DNV GL
Digital Solutions (DNV) requesting approval, pursuant to 49 CFR 190.9,
authorizing use of its Process Hazard Analysis Software Tool version
8.4 (Phast v8.4) as an alternate model for calculating, pursuant to
Sec. 193.2059, the flammable vapor-gas dispersion exclusion zones for
part 193-regulated LNG facilities.
PHMSA's safety standards for the siting of LNG facilities are found
in subpart B of part 193. Section 193.2059 in particular requires that
each LNG container and LNG transfer system must have a flammable vapor-
gas dispersion exclusion zone, defined as the area surrounding an LNG
facility in which an operator or government agency legally controls all
activities. The exclusion zone is intended to protect the public from
the flammable vapor gas and unsafe levels of thermal radiation in the
event of a release or ignition, respectively. In accordance with Sec.
193.2059(a), an LNG operator must calculate vapor-gas dispersion
exclusion zones using either the Dense Gas Dispersion model or FEM3A
model. Section 193.2059 also states that the Administrator (or his
delegate) may, pursuant to the procedures set forth in Sec. 190.9,
approve the use of alternative vapor-gas dispersion models that take
into account the same physical factors and have been validated by
experimental test data.
On May 18, 2020, DNV petitioned PHMSA for approval of its Phast
version 8.23 as an alternate model for calculating the LNG flammable
vapor-gas dispersion exclusion zones. PHMSA had previously approved
DNV's Phast versions 6.6 and 6.7 as alternate models for LNG flammable
vapor-gas dispersion on October 7, 2011. On September 4, 2020, DNV
submitted an updated petition requesting approval of Phast v8.4,
instead of version 8.23.
The petition request, draft letter of decision, and DEA for Phast
v8.4 are available for review and public comment in Docket No. PHMSA-
2021-0041. We invite interested persons to review and submit comments
on the draft letter of decision and the DEA in the docket. Please
include any comments on potential safety and environmental impacts that
may result if Phast v8.4 is approved. Comments may also include
relevant data.
Before issuing a final decision on DNV's petition, PHMSA will
evaluate all comments received on or before the comment closing date.
Comments received after the closing date will be evaluated if it is
possible to do so without incurring additional expense or delay. PHMSA
will consider each relevant comment we receive in making our final
decision to grant or deny this request.
Issued in Washington, DC, under authority delegated in 49 CFR
1.97.
Alan K. Mayberry,
Associate Administrator for Pipeline Safety.
[FR Doc. 2023-00621 Filed 1-12-23; 8:45 am]
BILLING CODE 4910-60-P
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