ML22101A077

Supplemental Information to License Amendment Request, Decommissioning Technical Specifications

ML22101A077
Person / Time
Site:	Three Mile Island
Issue date:	04/07/2022
From:	Van Noordennen G TMI-2 Solutions
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
TMl2-RA-COR-2022-0008
Download: ML22101A077 (3)

Text

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TMl-2 SOLUTIONS April 7, 2022 TMl2-RA-COR-2022-0008 10 CFR 50.90 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001

Subject:

Supplemental Information to License Amendment Request- Three Mile Island, Unit 2, Decommissioning Technical Specifications Three Mile Island, Unit 2 NRC Possession Only License No. DPR-73 NRC Docket No. 50-320

Reference:

(1) Letter TMl2-RA-COR-2022-0001 from G. P. van Noordennen (TMl-2 Solutions)

"Supplemental Information to License Amendment Request- Three Mile Island, Unit 2, Decommissioning Technical Specifications," dated January 5, 2022 (ML22010A066).

Attached as previously discussed with the NRC Staff is a revision to the Safe Fuel Mass Limit (SFML) calculation submitted via Reference 1.

This revision was required based on the discovery of the following minor errors in Reference 1 :

1. The impurity Eu-154 (ZAID 63154) was entered incorrectly in the MCNP input as 64154, which is the impurity Gd-154. Both have similar values, ranging 10E-8 to 10E-9, with an expected small resultant effect. As expected, the calculation shows the result to be within 0.05% of the original result (i.e. original Kett of 0.93617 vs. new result Kett of 0.93664); both results are substantially sub-critical.

The revised result is well within the calculational biases and subcritical limits of the original calculation.

2. Section 5.4.4 incorrectly noted the iron percentage as 1.51 wt.% after accounting for 90% credit. 1.51.wt. % represents 100% credit for iron and the text should have read 1.355 Wt.%. However, the input files for the calculation were correct and the error had no effect on the result. The report has been corrected to reflect the proper wt.% credit for iron.

TMl2-RA-COR-2022-0008 Page 2 of 2

3. The equation shown in 5.3.2 was corrected to remove the term 8 Mix 3

• This Impwf equation was identified as an incorrect representation of the underlying calculation during reviews following the identification of the material composition error discussed above. Removing this term was an editorial change and did not affect the results of the calculation.

The discovery of these errors was entered into the TMl-2 Corrective Action Program.

In accordance with 10 CFR 50.91 (b)(1 ), a copy of this submittal has been sent to the Commonwealth of Pennsylvania.

In the event that the NRC has any questions with respect to the content of this document or wishes to obtain any additional information, please contact me at 860-462-9707.

There are no Regulatory Commitments contained in this letter I declare under penalty of perjury that the foregoing is true and correct. Executed on April 7, 2022.

Sincerely,

.-; Digitally signed by Gerard van Noordennen Gerard van ,* DN: cn=Gerard van Noordennen, o=EnergySolutions,

• ', pu=Regulatory Affairs, Noordennen /

--eri\ail,=gpvannoordennen@energysolutions.com, c=US Date: 2022.04.07 13:39:31 -04'00' Gerard van Noordennen Senior Vice President Regulatory Affairs Attachments: - TMl2-EN-RPT-0001 "Determination of the Safe Fuel Mass Limit for Decommissioning TMl-2, Revision 1 cc w/

Attachment:

Amy Snyder, NRC Project Manager NRC Region I Administrator NRC Lead Inspector

TMl-2 Service List cc w/ Attachments:

Ken Robuck Director, Bureau of Radiation Protection President and CEO Department of Environmental Protectio~

Energy Solutions Commonwealth of Pennsylvania '

299 South Main Street, Suite 1700 Rachael Carson State Office BLDG.

Salt Lake City, UT 84111 13TH Floor P.O. Box 8469 John Sauger Harrisburg, PA 17105-8469 President and Chief Nuclear Officer Chief, Division of Nuclear Safety, Bureau Reactor D&D of Radiation Protection Energy Solutions Department of Enviro~mental Protection 121 W. Trade Street, Suite 2700 Commonwealth of Pennsylvania '

Charlotte, NC 28202 Rachael Carson State Office BLDG.

13TH Floor Mike Lackey P.O. BOX 8469 Senior Vice President Harrisburg, PA 17105-8469 D&D Operations Energy Solutions Chairman, Board of County 121 W. Trade Street, Suite 2700 Commissioners, Dauphin County Charlotte, NC 28202 112 Market Street 71h Floor Gerard van Noordennen Harrisburg, PA 17101 Senior Vice President Regulatory Affairs Energy Solutions Chairman, Board of Supervisors of 121 W. Trade Street, Suite 2700 Londonderry Township Charlotte, NC 28202 783 S. Geyers Church Rd.

Middletown PA 17057 Frank Helin Project Executive Trevor Orth TMl-2 Solutions Site Decommissioning Director 121 W. Trade Street, Suite 2700 Three Mile Island Generating Station Charlotte, NC 28202 Route 441 South Middletown, PA 17057 Russ Workman General Counsel Craig W Smith Energy Solutions Site Decommissioning Regulatory 299 South Main Street, Suite 1700 Assurance Lead Salt Lake City, UT 84111 Three Mile Island Generating Station Route 441 South Daniel F. Stenger Middletown, PA 17057 Hogan Lovells US LLP 555 13th St NW Washinaton, D.C. 20004