ML070040104
| ML070040104 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 12/20/2006 |
| From: | Morris J Duke Energy Corp |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML070040104 (7) | |
Text
JAMES R. MORRIS Duke Vice President (OW~Energye Catawba Nuclear Station 4800 Concord Rd. / CN01 VP York, SC 29745-9635 803 831 4251 803 831 3221 fax December 20, 2006 U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555-0001
Subject:
Duke Power Company LLC d/b/a Duke Energy Carolinas, LLC Catawba Nuclear Station, Units 1 and 2 Docket Nos. 50-413 and 50-414 Technical Specification Bases Changes Pursuant to 10CFR 50.4, please find attached changes to the Catawba Nuclear Station Technical Specification Bases.
These Bases changes were made according to the provisions of 10CFR 50.59.
Any questions regarding this information should be directed to A. P. Jackson, Regulatory Compliance, at (803) 831-3742.
I certify that I am a duly authorized officer of Duke Energy Corporation and that the information contained herein accurately represents changes-made to the Technical Specification Bases since the previous submittal.
James R. Morris Attachment www. duke-energy. cornov
U.S. Nuclear Regulatory Commission December 20, 2006 Page 2 xc:
W. D. Travers, Regional Administrator U.S. Nuclear Regulatory Commission, Region II Sam Nunn Atlanta Federal Center 61 Forsyth Street, S.W., Suite 23T85 Atlanta, GA 30303-8931 J. F. Stang, Jr., NRR Project Manager U.S. Nuclear Regulatory Commission One White Flint North, Mail Stop 8 H4A 11555 Rockville Pike Rockville, MD 20852-2738 A.T. Sabisch Senior Resident Inspector Catawba Nuclear Station
Duke rEOEnergy DUKE ENERGY CORPORA TION Catawba Nuclear Station 4800 Concord Road York, SC 29745 803 831 3000 December 20, 2006 Re:
Catawba Nuclear Station Technical Specifications Bases Please replace the corresponding pages in your copy of the Catawba Technical Specifications Manual as follows:
REMOVE THESE PAGES INSERT THESEPAGES LIST OF EFFECTIVE PAGES Page 26 Page 26 TAB 3.6.13 B 3.6.13 B 3.6.13-9 B 3.6.13 B 3.6.13-9 If you have any questions concerning the contents of this Technical Specification update, contact Debbie Rome at (803)831-3067.
Randy Hart Manager, Regulatory Compliance vww'w.
rI Je-o1eneig' coin
Page Number B 3.6.11-3 B 3.6.11-4 B 3.6.11-5 B 3.6.12-1 B 3.6.12-2 B 3.6.12-3 B 3.6.12-4 B 3.6.12-5 B 3.6.12-6 B 3.6.12-7 B 3.6.12-8 B 3.6.12-9 B 3.6.12-10 B 3.6.12-11 B 3.6.13-1 B 3.6.13-2 B 3.6.13-3 B 3.6.13-4 B 3.6.13-5 B 3.6.13-6 B 3.6.13-7 B 3.6.13-8 B 3.6.13-9 B 3.6.14-1 B 3.6.14-2 B 3.6.14-3 B 3.6.14-4 B 3.6.14-5 B 3.6.14-6 B 3.6.15-1 B 3.6.15-2 B 3.6.15-3 B 3.6.15-4 Amendment Revision 0 Revision 1 Revision 2 Revision 3 Revision 2 Revision 3 Revision 3 Revision 2 Revision 4 Revision 3 Revision 2 Revision 3 Revision 2 Revision 1 Revision 0 Revision 0 Revision 0 Revision 0 Revision 0 Revision 0 Revision 0 Revision 2 Revision 1 Revision 0 Revision 0 Revision 0 Revision 0 Revision 0 Revision 0 Revision 0 Revision 0 Revision 0 Revision 0 Revision Date 9/30/98 2/26/99 2/26/99 5/10/05 5/1 0/05 5/10/05 5/10/05 5/10/05 5/10/05 5/10/05 5/10/05 5/10/05 5/10/05 5/10/05 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 12/4/06 12/4/06 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 9/30/98 Catawba Units 1 and 2Pae21/40 Page 26 12/4/06
Ice Condenser Doors B 3.6.13 BASES SURVEILLANCE REQUIREMENTS (continued)
- c.
The light construction of the doors would ensure that, in the event of a DBA, air and gases passing through the ice condenser would find a flow path, even if a door were obstructed.
SR 3.6.13.4 Verifying, by visual inspection, that the ice condenser inlet doors are not impaired by ice, frost, or debris provides assurance that the doors are free to open in the event of a DBA. For this unit, the Frequency of 18 months is based on door design, which does not allow water condensation to freeze, and operating experience, which indicates that the inlet doors very rarely fail to meet their SR acceptance criteria.
Because of high radiation in the vicinity of the inlet doors during power operation, this Surveillance is normally performed during a shutdown.
S R 3.6.13.5 Verifying the opening torque of the inlet doors provides assurance that no doors have become stuck in the closed position. The value of 675 in-lb is based on the design opening pressure on the doors of 1.0 lb/ft2. For this unit, the Frequency of 18 months is based on the passive nature of the closing mechanism (i.e., once adjusted, there are no known factors that would change the setting, except possibly a buildup of ice; ice buildup is not likely, however, because of the door design, which does not allow water condensation to freeze). Operating experience indicates that the inlet doors usually meet their SR acceptance criteria. Because of high radiation in the vicinity of the inlet doors during power operation, this Surveillance is normally performed during a shutdown.
S R 3.6.13.6 The torque test Surveillance ensures that the inlet doors have not developed excessive friction and that the return springs are producing a door return torque within limits. The torque test consists of the following:
Catawba Units 1 and 2B361-7RvsoN.0B 3.6.13-7 Revision No. 0
41
-, I Ice Condenser Doors B 3.6.13 BASES SURVEILLANCE REQUIREMENTS (continued)
- 1. Verify that the torque, T(OPEN), required to cause opening motion at the 400 open position is
- ! 195 in-lb;
- 2.
Verify that the torque, T(CLOSE), required to hold the door stationary (i.e., keep it from closing) at the 400 open position is 78 in-lb but < 250.6 in-Ib; and
- 3.
Calculate the frictional torque, T(FRICT) = 0.5 {T(OPEN) -
T(CLOSE)}, and verify that the T(FRICT) is > - 40 in-lb but < + 40 in-lb.
The purpose of the friction and return torque Specifications is to ensure that, in the event of a small break LOCA or SLB, all of the 24 door pairs open uniformly. This assures that, during the initial blowdown phase, the steam and water mixture entering the lower: compartment does not pass through part of the ice condenser, depleting the ice there, while bypassing the ice in other bays. The Frequency of 18 months is based on the passive nature of the closing mechanism (i.e., once adjusted, there are no known factors that would change the setting, except possibly a buildup of ice; ice buildup is not likely, however, because of the door design, which does not allow water condensation to freeze). Operating experience indicates that the inlet doors very rarely fail to meet their SR acceptance criteria. Because of high radiation in the vicinity of the inlet doors during power operation, this Surveillance is normally performed during a shutdown.
SIR 3.6.13.7 Verifying the OPERABILITY of the intermediate deck doors provides assurance that the intermediate deck doors are free to open in the event of a DBA. The verification consists of visually inspecting the intermediate doors for structural deterioration, verifying free movement of the vent assemblies, and ascertaining free movement of each door when lifted with the applicable force shown below:
Door Lifting Force
- a.
Adjacent to crane wall
- 37.4 lb
- b.
Paired with door adjacent to crane wall
- 33.8 lb
- c.
Adjacent to containment wall
- 31.8 lb
- d.
Paired with door adjacent to containment
- 31.0 lb wall Catawba Units 1 and 2 B3 38Rvso o
R 3 6 13-8 Revision No. 2
Ice Condenser Doors B 3.6.13 BAS ES SURVEILLANCE REQUIREMENTS (continued)
The 18 month Frequency is based on the passive design of the intermediate deck doors, the frequency of personnel entry into the intermediate deck, and the fact that SR 3.6.13.2 confirms on a 7 day Frequency that the doors are not impaired by ice, frost, or debris, which are ways a door would fail the opening force test (i.e., by sticking or from increased door weight).
REFERENCES
- 1.
UFSAR, Chapter 6.
- 2.
- 3.
10 CFR 50.36, Technical Specifications, (c)(2)(ii).
- 4.
DPC-1201.17-00-0006, "Design and Licensing Basis for Ice Condenser Lower Inlet Doors Technical Specification Surveillance Requirements, 4Q00 Opening,. Closing and Frictional Torques."
Catawba Units 1 and 2B36.39RvsoN.1B 3.6.13-9 Revision No. 1