ML24170A724

Individual Notice of Consideration of Issuance of Amendments to Renewed Facility Operating Licenses, Proposed No Significant Hazards Consideration Determination, Opportunity for Hearing(Epid L-2024-LLA-0079) FRN

ML24170A724
Person / Time
Site:	Limerick
Issue date:	06/20/2024
From:	Audrey Klett Plant Licensing Branch 1
To:
Klett, AL
Shared Package
ML24170A771	List: ML24170A724 ML24170A770
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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