ML110770025
| ML110770025 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 03/16/2011 |
| From: | Bethay S Entergy Nuclear Operations |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 2.11.021, TAC MC9669 | |
| Download: ML110770025 (6) | |
Text
vEntergy Entergy Nuclear Operations, Inc.
Pilgrim Nuclear Power Station 600 Rocky Hill Road Plymouth, MA 02360 Stephen J. Bethay Director, Nuclear Safety Assurance March 16, 2011 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555
SUBJECT:
Entergy Nuclear Operations, Inc.
Pilgrim Nuclear Power Station Docket 50-293 License No. DPR-35
REFERENCES:
Pilgrim Nuclear Power Station License Renewal Application Annual Update Supplemental Information (TAC MC9669)
- 1.
Entergy Letter to U.S. NRC, License Renewal Application, dated January 25, 2006
- 2.
Entergy Letter No. 2.10.058, "Pilgrim Nuclear Power Station License Renewal Application 2010 Annual Update (TAC MC9669)", dated December 22, 2010 LETTER NUMBER:
2.11.021
Dear Sir or Madam:
By Reference 1, Entergy Nuclear Operations, Inc. (Entergy) submitted the License Renewal Application (LRA) for Pilgrim Nuclear Power Station (PNPS).
Pilgrim Nuclear Power Station submitted the 2010 License Renewal Application (LRA) Annual Update by Entergy Letter 2.10.058, dated December 22, 2010. The LRA update indicated changes in the current licensing basis since the last update in 2009.
Upon review of the 2010 LRA Annual Update, the staff had questions concerning the following issues:
0 0
Circulating Water System Thermowells HVAC Humidifier Plastic Filter Housing Information clarifying each of the above is presented in the Enclosure to this letter.
Entergy is required by 10 CFR 54.21(b) to report changes to the current licensing basis (CLB) that materially affect the content of the PNPS LRA, including the Safety Analysis Report (SAR) supplement. In accordance with this requirement, Entergy is providing the requested supplemental information to the annual update.
Entergy Nuclear Operations, Inc Pilgrim Nuclear Power Station Letter Number 2.11.021 Page 2 This letter contains no commitments.
If you have any questions or require additional information, please contact Mr. Joseph R. Lynch, Licensing Manager, at (508) 830-8403.
I declare under penalty of perjury that the foregoing is true and correct.
Executed on the I L of March, 2011.
Sincerely, Stephen J. Bethay MJG/mg
Enclosure:
PNPS License Renewal Changes (3 pages)
Entergy Nuclear Operations, Inc Pilgrim Nuclear Power Station cc:
Ms. Lisa Regner Project Manager Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Susan L. Uttal, Esq.
Office of the General Counsel U.S. Nuclear Regulatory Commission Mail Stop 0-15 D21 Washington, DC 20555-0001 Mr. Richard V. Guzman, Project Manager Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Sheila Slocum Hollis, Esq.
Duane Morris LLP 505 9th Street, N.W.., Suite 1000 Washington, DC 20004-2166 Catherine Haney, Director Office of Nuclear Material and Safeguards U.S. Nuclear Regulatory Commission Washington, DC 20555-00001 Mr. William M. Dean, Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 Letter Number 2.11.021 Page 3 Mr. Matthew Brock, Esq.
Commonwealth of Massachusetts Assistant Attorney General Environmental Protection Division One Ashburton Place Boston, MA 02108 Diane Curran, Esq.
Harmon, Curran, and Eisenberg, L.L.P.
1726 M Street N.W., Suite 600 Washington, DC 20036 Mr. Robert Gallaghar, Acting Director Massachusetts Department of Public Health Radiation Control Program Schrafft Center, Suite 1 M2A 529 Main Street Charlestown, MA 02129 Mr. John Giarrusso Jr.
Planning and Preparedness Division Manager Mass. Emergency Management Agency 400 Worcester Road Framingham, MA 01702 Mr. Eric J. Leeds, Director
ýOffice of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555-00001 NRC Resident Inspector Pilgrim Nuclear Power Station
Entergy Nuclear Operations, Inc.
Pilgrim Nuclear Power Station Letter Number: 2.11.021 Enclosure, Page 1 Enclosure PNPS License Renewal Annual Update Draft Requests for Additional Information (RAI) Responses (3 pages)
Entergy Nuclear Operations, Inc.
Letter Number: 2.11.021 Pilgrim Nuclear Power Station Enclosure, Page 2 DRAFT RAI 3.3.2-14-1-1
Background
By letter dated December 22, 2010, the applicant updated LRA Table 3.3.2-14-1 to add copper alloy with greater than 15 percent zinc thermowells exposed externally to condensation which is being managed for loss of material by the System Walkdown Program.
LRA Table 3.0-1 states that "[f]or exterior surfaces, condensation is considered untreated water due to potential for surface contamination." The GALL Report recommends that copper alloy with greater than 15 percent zinc components that are exposed to treated, raw, or closed cycle cooling water be managed for loss of material due to selective leaching using GALL AMP XI.M33, "Selective Leaching of Materials."
Issue There are no items in LRA Table 3.3.2-14-1 to manage loss of material due to selective leaching for copper alloy with greater than 15 percent zinc thermowells exposed externally to condensation.
Request Clarify how copper alloy with greater than 15 percent zinc thermowells exposed externally to condensation are being managed for loss of material due to selective leaching.
Response
Table 3.3.2-14-1 is incorrect. The copper alloy components added to Table 3.3.2-14 are actually bronze thermowells. Bronze is a copper alloy containing tin, but no zinc. There is no operating experience documented in the GALL Report or at PNPS that indicates loss of material from bronze due to selective leaching is an aging effect requiring management; therefore no aging management program (AMP) is necessary to manage loss of material due to selective leaching.
For the thermowell lines added to LRA Table 3.3.2-14-1 in the December 22, 2010 letter, the entries in the Material column are revised to read "Copper alloy <15% Zn."
Entergy Nuclear Operations, Inc.
Letter Number: 2.11.021 Pilgrim Nuclear Power Station Enclosure, Page 3 DRAFT RAI 3.3.2-14-15-1 Backgqround By letter dated December 22, 2010, the applicant updated LRA Table 3.3.2-14-15 to add plastic filter housings exposed externally to indoor air and internally to treated water. The applicant stated that this material and environment combination has no aging effects requiring management and no aging management program is required.
Issue Some types of plastic can experience aging effects when exposed to air or water. It is unclear to the staff whether the filter housings can experience aging effects because the applicant did not state what type of plastic was used to construct the filter housings.
Reauest Clarify what type of plastic was used to construct the filter housings exposed to indoor air and treated water.
Response
PNPS added a non-Q humidifier to the control room ventilation system. The treated water system feeding the humidifier is equipped with a filter to remove sediment from the water before the water reaches the humidifier. The filter housing (sump and cap) is made of polypropylene which is compatible with the internal and external environment. Therefore, no AMP is required.