ML15168A011

Perry - Submittal of the 2015 Silicone Sealant Report Pursuant to License Commitment 17

ML15168A011
Person / Time
Site:	Perry
Issue date:	06/12/2015
From:	Harkness E J FirstEnergy Nuclear Operating Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
L-15-193
Download: ML15168A011 (3)

Text

Perry Nuclear Power PlantFENOC- O. Box 97F10 Center RoadFirstEnergy Nuclear Operating Company Perry, Ohio 44081Ernest J. Harkness 440-280-5382 Vice President Fax: 440-280-8029 June 12, 2015L-15-193ATTN: Document Control DeskU.S. Nuclear Regulatory Commission Washington, DC 20555-0001

SUBJECT:

Perry Nuclear Power PlantDocket No. 50-440, License Number NPF-582015 Silicone Sealant Report Pursuant to License Commitment 17Attached is the 2015 Silicone Sealant Report for the Perry Nuclear Power Plant(PNPP). This report fulfills ongoing commitments associated with License Commitment 17 contained in the PNPP Updated Safety Analysis Report, Appendix 1 B.There are no new regulatory commitments contained in this letter. If there are anyquestions or if additional information is required please contact Mr. Nicola Conicella, Manager -Regulatory Compliance, at (440) 280-5415.

Sincerely, Ernest J. Harkness

Attachment:

2015 Silicone Sealant Report Pursuant to License Commitment 17cc: NRC Region III Administrator NRC Resident Inspector OfficeNRC Project ManagerREIRS Project ManagerA --

Attachment L-15-193Page 1 of 2Attachment L-1 5-193FIRSTENERGY NUCLEAR OPERATING COMPANYPERRY NUCLEAR POWER PLANTDOCKET NUMBER: 50-440 LICENSE NUMBER: NPF-58Silicone Sealant Report Pursuant to License Commitment 17ContentsSilicone Sealant Inspections and Testing Attachment L-1 5-193Page 2 of 2Silicone Sealant Inspections and TestingBackground License Commitment 17 contained in the Perry Nuclear Power Plant (PNPP) UpdatedSafety Analysis Report, Appendix 1 B, contains an ongoing commitment to:a) PNPP will place the ductwork test specimens used for qualification testing ofsilicone sealant into the plant in an area environmentally approximate to the ESFventilation systems.

During each refueling outage, PNPP will leak test these testspecimens to determine if any degradation of the silicone has occurred.

b) PNPP will perform an engineering walkdown of the ESF ventilation systemsduring each refueling outage. This walkdown will consist of a visual inspection ofa representative portion of exposed ductwork to check for indication of sealantdegradation.

c) The results of "a" and "b" above, will be briefly summarized and reported to theNRC for years in which refueling outages occur.During 2015, the PNPP completed the fifteenth refueling outage (1R15). Themaintenance plan to inspect duct sealant degradation and to test duct samples wassatisfactorily completed in 1 R1 5. This report fulfills the ongoing commitment associated with Licensing Commitment 17 (L01090) of the PNPP Updated Safety Analysis Report,Appendix 1 B, "Silicone Sealant".

ResultsThe duct specimens were individually leak tested at rated pressure, in place, in theIntermediate Building 585 feet pipe chase. The thermoluminescent dosimeter (TLD)swere removed during the refueling outage and analyzed after their respective identification numbers were recorded.

The resulting dose (reported in millirem (mrem))recorded for specimen I on TLD S/N 8903010313 is 82,596 mrem (Deep) and forspecimen 2 on TLD S/N 8903000313 is 120,679 mrem (Deep). New dosimetry wasinstalled during 1R15, specimen 1, TLD S/N 1746, and specimen 2, TLD S/N 1747.The results of the duct specimen leak test for the General Electric Silpruf and Foster30-02 sealants showed no degradation in air leakage at the sealant connections.

The Engineered Safety Features (ESF) ventilation systems (i.e., the Annulus ExhaustGas Treatment (M15) system, the Control Room HVAC [Heating, Ventilation, and AirConditioning]

(M25/26) system, and the Fuel Handling Building Ventilation (M40)system),

were walked down and a representative portion of the exposed exteriorsilicone sealants were inspected.

The exposed exterior sealant on the ductworkinspected during this walkdown was found to be in good condition with no observable degradation or leakage.