ML24170A724
| ML24170A724 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 06/20/2024 |
| From: | Audrey Klett Plant Licensing Branch 1 |
| To: | |
| Klett, AL | |
| Shared Package | |
| ML24170A771 | List: |
| References | |
| EPID L-2024-LLA-0079, NRC-2024-0113, 89 FR 53124; June 25, 2024 | |
| Download: ML24170A724 (12) | |
Text
[7590-01-P]
NUCLEAR REGULATORY COMMISSION
[Docket Nos. 50-352 and 50-353; NRC-2024-0113]
Constellation Energy Generation, LLC;
Limerick Generating Station, Units 1 and 2;
License Amendment Request
AGENCY: Nuclear Regulatory Commission.
ACTION: Opportunity to comment, request a hearing, and petition for leave to intervene.
SUMMARY
- The U.S. Nuclear Regulatory Commission (NRC) is considering issuance of
amendments to Renewed Facility Operating License Nos. NPF-39 and NPF-85, issued
to Constellation Energy Generation, LLC for operation of the Limerick Generating
Station, Units 1 and 2. The proposed amendments would revise the technical
specifications for detecting and responding to leakage in the turbine enclosure main
steam line tunnel.
DATES: Submit comments by July 25, 2024. Comments received after this date will be
considered if it is practical to do so, but the NRC is able to ensure consideration only for
comments received on or before this date. Requests for a hearing or petition for leave to
intervene must be filed by August 26, 2024.
ADDRESSES: You may submit comments by any of the following methods; however,
the NRC encourages electronic comment submission through the Federal rulemaking
website.
- Federal rulemaking website: Go to https://www.regulations.gov and search
for Docket ID NRC-2024-0113. Address questions about Docket IDs in Regulations.gov
to Stacy Schumann; telephone: 301-415-0624; email: Stacy.Schumann@nrc.gov. For technical questions, contact the individual listed in the For Further Information Contact
section of this document.
- Mail comments to: Office of Administration, Mail Stop: TWFN-7-A60M, U.S.
Nuclear Regulatory Commission, Washington, DC 20555-0001, ATTN: Program
Management, Announcements and Editing Staff.
For additional direction on obtaining information and submitting comments, see
Obtaining Information and Submitting Comments in the SUPPLEMENTARY
INFORMATION section of this document.
FOR FURTHER INFORMATION CONTACT: Audrey Klett, Office of Nuclear Reactor
Regulation, U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001,
telephone: 301-415-0489; email: Audrey.Klett@nrc.gov.
SUPPLEMENTARY INFORMATION:
I. Obtaining Information and Submitting Comments
A. Obtaining Information
Please refer to Docket ID NRC-2024-0113 when contacting the NRC about the
availability of information for this action. You may obtain publicly available information
related to this action by any of the following methods:
- Federal Rulemaking Website: Go to https://www.regulations.gov and
search for Docket ID NRC-2024-0113.
- NRCs Agencywide Documents Access and Management System
(ADAMS): You may obtain publicly available documents online in the ADAMS Public
Documents collection at https://www.nrc.gov/reading-rm/adams.html. To begin the
search, select Begin Web-based ADAMS Search. For problems with ADAMS, please
contact the NRCs Public Document Room (P DR) reference staff at 1-800-397-4209, at
2 301-415-4737, or by email to PDR.Resour ce@nrc.gov. The license amendment request
is available in ADAMS under Accession No. ML24165A264.
- NRCs PDR: The PDR, where you may examine and order copies of publicly
available documents, is open by appointment. To make an appointment to visit the PDR,
please send an email to PDR.Resource@nrc.gov or call 1-800-397-4209 or 301-415-
4737, between 8 a.m. and 4 p.m. eastern time (ET), Monday through Friday, except
Federal holidays.
B. Submitting Comments
The NRC encourages electronic comment submission through the Federal
rulemaking website (https://www.regulations.gov). Please include Docket ID NRC-
2024-0113 in your comment submission.
The NRC cautions you not to include identif ying or contact information that you
do not want to be publicly disclosed in y our comment submission. The NRC will post all
comment submissions at https://www.regulat ions.gov as well as enter the comment
submissions into ADAMS. The NRC does not routinely edit comment submissions to
remove identifying or contact information.
If you are requesting or aggregating comments from other persons for
submission to the NRC, then you should inform those persons not to include identifying
or contact information that they do not w ant to be publicly disclosed in their comment
submission. Your request should state that the NRC does not routinely edit comment
submissions to remove such information before making the comment submissions
available to the public or entering the comment into ADAMS.
II. Introduction
The NRC is considering issuance of amendments to Renewed Facility Operating
License Nos. NPF-39 and NPF-85 (Docket Nos. 50-352 and 50-353, respectively)
3 issued to Constellation Energy Generation, LLC for operation of the Limerick Generating
Station, Units 1 and 2, located in Montgomery County, Pennsylvania.
The proposed amendments would revise the technical specifications for
detecting and responding to leakage in the turbine enclosure main steam line tunnel.
The proposed amendments would delete turbine enclosure main steam line tunnel
temperature requirements from various instrumentation-related technical specifications
and add a new specification to verify there is no leakage from the main steam line
pressure boundary when the turbine enclosure main steam line tunnel temperature
exceeds a certain value.
Before issuance of the proposed license amendments, the NRC will need to
make the findings required by the Atomic Energy Act of 1954, as amended (the Act), and
NRCs regulations.
The NRC has made a proposed determination that the license amendment
request involves no significant hazards consideration. Under the NRCs regulations in
section 50.92 of title 10 of the Code of Federal Regulations (10 CFR), Issuance of
amendment, this means that operation of t he facility in accordance with the proposed
amendment would not (1) involve a significant increase in the probability or
consequences of an accident previously evaluated; or (2) create the possibility of a new
or different kind of accident from any accident previously evaluated; or (3) involve a
significant reduction in a margin of safety. As required by 10 CFR 50.91(a), the licensee
has provided its analysis of the issue of no si gnificant hazards consideration, which is
presented as follows:
- 1. Do the proposed amendments involve a significant increase in the probability
or consequences of an accident previously evaluated?
Response: No.
4 The proposed changes do not alter any of t he previously evaluated accidents in
the UFSAR [updated final safety analysis report]. The proposed changes do not affect
any of the initiators of previously evaluat ed accidents in a manner that would increase
the likelihood of the event. The proposed change also eliminates the automatic MSIV
[main steam isolation valve] isolation function associated with TE [turbine enclosure]
MSL [main steam line] Tunnel high temperature from the requirements of the Technical
Specifications (TS) and creates TS requirements for TE MSL tunnel temperature
monitoring in a new TS 3/4.7.9.
Automatic isolation of the MSIVs on TE MSL tunnel high temperature is not an
initiator of any accident previously evaluated. A manual plant shutdown initiated due to
MSL leakage in the TE MSL tunnel is not an initiator of any accident previously
evaluated. There is no credit taken in any licensing basis analysis for MSIV closure on
TE MSL tunnel high temperature, and there are no calculations that credit the subject
isolation function as a mitigative feature.
As a result, the likelihood of malfunction of an SSC [structure, system, and
component] is not increased. The capability and operation of the mitigation systems are
not affected by the proposed changes. Thus, the mitigating systems will continue to be
initiated and mitigate the consequences of an accident as assumed in the analysis of
accidents previously evaluated.
Therefore, the proposed changes do not involve a significant increase in the
probability or consequences of an accident previously evaluated.
- 2. Do the proposed amendments create the possibility of a new or different kind
of accident from any accident previously evaluated?
Response: No.
5 The proposed changes will not introduce any new operating modes, safety-
related equipment lineups, accident scenarios, syst em interactions, or failure modes that
would create a new or different type of acci dent. Failure(s) of the system will have the
same effect as the present design.
The proposed change also eliminates the automatic MSIV isolation function
associated with TE MSL Tunnel high temperature from the requirements of the TS and
creates TS requirements for TE MSL tunnel temperature monitoring in a new TS 3/4.7.9.
Eliminating the automatic isolation of the MSIVs will not create a new or different kind of
accident from those previously evaluated as a Main Steam Line Break has been
evaluated. Elimination of the automatic isolation function will not create a new failure
mechanism as a plant shutdown continues to be required if an MSL leak is detected.
The proposed change from an automatic shutdown to a manual shutdown will not
create any credible new failure mechanisms, malfunctions, or accident initiators not
considered in the design and licensing bases. The unlikely failure to manually detect an
MSL leak and shutdown the plant and that failure leading to a Main Steam Line Break
has already been evaluated and is not a new type of accident.
Therefore, the proposed changes do not create the possibility of a new or
different kind of accident from any accident previously evaluated.
- 3. Do the proposed amendments involve a si gnificant reduction in a margin of
safety?
Response: No.
The proposed changes do not affect the accident source term, containment
isolation, or radiological release assumptions used in evaluating the radiological
consequences of any accident previously ev aluated and are consistent with safety
analysis assumptions and resultant consequences. The proposed changes do not
6 impact reactor operating parameters or the functional requirements of the affected
instrumentation systems. These systems w ill continue to provide the design basis
reactor trips and protective system actuati ons. All design basis events, and the reliance
on the reactor trips and protective system actuations will remain unchanged. No
controlling numerical values for parameters established in the UFSAR or the license or
Safety Limits are affected by the proposed changes.
Therefore, the proposed changes do not involve a significant reduction in a
margin of safety.
The NRC staff has reviewed the licensees ana lysis and, based on this review, it
appears that the three standards of 10 CFR 50.92(c) are satisfied. Therefore, the NRC
staff proposes to determine that the license amendment request involves no significant
hazards consideration.
The NRC is seeking public comments on this proposed determination that the
license amendment request involves no significant hazards consideration. Any
comments received within 30 days after the date of publication of this notice will be
considered in making any final determination.
Normally, the Commission will not issue the amendment until the expiration of 60
days after the date of publication of this notice. The Commission may issue the license
amendment before expiration of the 60-day not ice period if the Commission concludes
the amendment involves no significant hazards consideration. In addition, the
Commission may issue the amendment prior to the expiration of the 30-day comment
period if circumstances change during the 30-day comment period such that failure to
act in a timely way would result, for example, in derating or shutdown of the facility. If the
Commission takes action prior to the expiration of either the comment period or the
notice period, it will publish in the Federal Register a notice of issuance. If the
7 Commission makes a final no significant hazards consideration determination, any
hearing will take place after issuance. The Commission expects that the need to take
this action will occur very infrequently.
III. Opportunity To Request a Hearing and Petition for Leave To Intervene
Within 60 days after the date of publication of this notice, any person (petitioner)
whose interest may be affected by this action may file a request for a hearing and
petition for leave to intervene (petition) with re spect to the action. Petitions shall be filed
in accordance with the Commissions Agency Rules of Practice and Procedure in
10 CFR part 2. Interested persons should consult 10 CFR 2.309. If a petition is filed, the
presiding officer will rule on the petition and, if appropriate, a notice of a hearing will be
issued.
Petitions must be filed no later than 60 days from the date of publication of this
notice in accordance with the filing instructions in the Electronic Submissions (E-Filing)
section of this document. Petitions and motions for leave to file new or amended
contentions that are filed after the deadline will not be entertained absent a
determination by the presiding officer t hat the filing demonstrates good cause by
satisfying the three factors in 10 CFR 2.309(c)(1)(i) through (iii).
If a hearing is requested and the Commission has not made a final determination
on the issue of no significant hazards consideration, the Commission will make a final
determination on the issue of no significant hazards consideration, which will serve to
establish when the hearing is held. If the final determination is that the amendment
request involves no significant hazards consideration, the Commission may issue the
amendment and make it immediately effect ive, notwithstanding the request for a
hearing. Any hearing would take place after issuance of the amendment. If the final
determination is that the amendment request involves a significant hazards
8 consideration, then any hearing held would take place before the issuance of the
amendment unless the Commission finds an imminent danger to the health or safety of
the public, in which case it will issue an appropriate order or rule under 10 CFR part 2.
A State, local governmental body, Federally recognized Indian Tribe, or
designated agency thereof, may submit a petition to the Commission to participate as a
party under 10 CFR 2.309(h) no later than 60 days from the date of publication of this
notice. Alternatively, a State, local go vernmental body, Federally recognized Indian
Tribe, or agency thereof may participate as a non-party under 10 CFR 2.315(c).
For information about filing a petition and about participation by a person not a
party under 10 CFR 2.315, see ADAMS Accession No. ML20340A053
(https://adamswebsearch2.nrc.gov/webSear ch2/main.jsp?AccessionNumber=ML20340A
053) and on the NRCs public website at
https://www.nrc.gov/about-nrc/regulatory/adjudicatory/hearing.html#participate.
IV. Electronic Submissions and E-Filing
All documents filed in NRC adjudicatory proceedings, including documents filed
by an interested State, local governmental body, Federally recognized Indian Tribe, or
designated agency thereof that requests to participate under 10 CFR 2.315(c), must be
filed in accordance with 10 CFR 2.302. The E-Filing process requires participants to
submit and serve all adjudicatory documents over the internet, or in some cases, to mail
copies on electronic storage media, unless an exemption permitting an alternative filing
method, as further discussed, is granted. Detailed guidance on electronic submissions is
located in the Guidance for Electronic S ubmissions to the NRC (ADAMS Accession
No. ML13031A056) and on the NRCs public websit e at https://www.nrc.gov/site-help/e-
submittals.html.
9 To comply with the procedural requirements of E-Filing, at least 10 days prior to
the filing deadline, the participant should contact the Office of the Secretary by email at
Hearing.Docket@nrc.gov, or by telephone at 301-415-1677, to (1) request a digital
identification (ID) certificate, which allows the participant (or its counsel or
representative) to digitally sign submissions and access the E-Filing system for any
proceeding in which it is participating; and (2) advise the Secretary that the participant
will be submitting a petition or other adjudicatory document (even in instances in which
the participant, or its counsel or represent ative, already holds an NRC-issued digital ID
certificate). Based upon this information, the Secretary will establish an electronic docket
for the proceeding if the Secretary has not already established an electronic docket.
Information about applying for a digital ID certificate is available on the NRCs
public website at https://www.nrc.gov/site-hel p/e-submittals/getting-started.html. After a
digital ID certificate is obtained and a docket created, the participant must submit
adjudicatory documents in Portable Document Format. Guidance on submissions is
available on the NRCs public website at http s://www.nrc.gov/site-help/electronic-sub-ref-
mat.html. A filing is considered complete at the time the document is submitted through
the NRCs E-Filing system. To be timely, an electronic filing must be submitted to the
E-Filing system no later than 11:59 p.m. ET on the due date. Upon receipt of a
transmission, the E-Filing system time-sta mps the document and sends the submitter an
email confirming receipt of the document. The E-Filing system also distributes an email
that provides access to the document to the NRCs Office of the General Counsel and
any others who have advised the Office of the Secretary that they wish to participate in
the proceeding, so that the filer need not serve the document on those participants
separately. Therefore, applicants and other participants (or their counsel or
10 representative) must apply for and receive a digital ID certificate before adjudicatory
documents are filed to obtain access to the documents via the E-Filing system.
A person filing electronically using the NRCs adjudicatory E-Filing system may
seek assistance by contacting the NRCs Electronic Filing Help Desk through the
Contact Us link located on the NRCs public website at https://www.nrc.gov/site-help/e-
submittals.html, by email to MSHD.Resource@nrc.gov, or by a toll-free call at
1-866-672-7640. The NRC Electronic Filing Help Desk is available between 9 a.m. and
6 p.m., ET, Monday through Friday, except Federal holidays.
Participants who believe that they hav e good cause for not submitting documents
electronically must file an exemption request, in accordance with 10 CFR 2.302(g), with
their initial paper filing stating why there is good cause for not filing electronically and
requesting authorization to continue to submit documents in paper format. Such filings
must be submitted in accordance with 10 CFR 2.302(b)-(d). Participants filing
adjudicatory documents in this manner are re sponsible for serving their documents on all
other participants. Participants granted an exemption under 10 CFR 2.302(g)(2) must
still meet the electronic formatting requirement in 10 CFR 2.302(g)(1), unless the
participant also seeks and is granted an exemption from 10 CFR 2.302(g)(1).
Documents submitted in adjudicatory proceedings will appear in the NRCs
electronic hearing docket, which is publicly available at https://adams.nrc.gov/ehd,
unless excluded pursuant to an order of the presiding officer. If you do not have an
NRC-issued digital ID certificate as previ ously described, click cancel when the link
requests certificates and you will be autom atically directed to the NRCs electronic
hearing docket where you will be able to acce ss any publicly available documents in a
particular hearing docket. Participants are requested not to include personal privacy
information such as social security numbers, home addresses, or personal phone
11 numbers in their filings unless an NRC regulation or other law requires submission of
such information. With respect to copyrighted works, except for limited excerpts that
serve the purpose of the adjudicatory filings and would constitute a Fair Use application,
participants should not include copyrighted materials in their submission.
For further details with respect to this action, see the application for license
amendment dated June 13, 2024 (ADAMS Accession No. ML24165A264).
Attorney for licensee : Jason Zorn, Associate General Counsel, Constellation
Energy Generation, LLC, 101 Constitution Ave, NW, Suite 400 East, Washington DC
20001.
NRC Branch Chief: Hipolito Gonzalez.
Dated: June 20, 2024.
For the Nuclear Regulatory Commission.
/RA/
Audrey Klett, Senior Project Manager, Plant Licensing Branch I, Division of Operating Reactor Licensing, Office of Nuclear Reactor Regulation.
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