ML091410284
| ML091410284 | |
| Person / Time | |
|---|---|
| Site: | Watts Bar  |
| Issue date: | 05/18/2009 |
| From: | Bajestani M Tennessee Valley Authority |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| TAC MD9182 | |
| Download: ML091410284 (7) | |
Text
Tennessee Valley Authority, Post Office Box 2000, Spring City, TN 37381-2000 May 18, 2009 10 CFR 50.54f U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Stop: OWFN P1-35 Washington, D.C. 20555-0001 In the Matter of
)
Docket No. 50-391 Tennessee Valley Authority
)
WATTS BAR NUCLEAR PLANT (WBN) - UNIT 2 - ADDITIONAL INFORMATION REGARDING WBN UNIT 2 CORRECTIVE ACTION PROGRAMS (TAC NO.
MD9182)
The purpose of this letter is to provide additional information regarding the WBN Unit 2 Cable Issues Corrective Action Program (CAP). This CAP is discussed in Reference 1, section 1.13.1, under item (1) Cable Issues.
TVA had submitted a proposed approach to resolution of sub-issues of the Cable Issues CAP at WBN Unit 2 that was different from the approach used for WBN Unit 1 to the NRC on May 29, 2008 (Reference 2). TVA then submitted a proposed approach to resolve sub-issues of the Cable Issues CAP at Unit 2 using the WBN Unit 1 approach on September 26, 2008 (Reference 3). In Reference 4, the NRC requested additional information. TVA responded to the NRC's request for additional information on January 14, 2009 (Reference 5). Subsequently, a teleconference was held on February 10, 2009, and a public meeting was held on March 17, 2009 (Reference 6). At the public meeting, TVA presented information intended to answer the questions from the teleconference. In Reference 7, TVA provided written responses to the questions from the teleconference as well as written responses to additional questions from the March 17 public meeting.
For current Class 1 E cable purchases, the allowable sidewall pressure is specified in the Certificate of Compliance furnished by the vendor. Enclosure 1 provides an example cable manufacturer's certificate of compliance and an additional certificate from the vendor on recommended maximum sidewall pressure for the cable.
Printed on recycled paper
U. S. Nuclear Regulatory Commission Page 2 May 18, 2009 As part of the jamming sub-issue, TVA reviewed cable pull slips for the Unit 2 Class 1 E cables to determine if a power-assisted pull was documented. Out of a total population of 4,097 Unit 2-only Class 1E cables, 215 did not have a pull card, 186 were never installed, 19 were not marked on the pull cards, and 2 cables were pushed. Therefore, out of the 3,911 cables installed (4,097-186), 234 cables (215+19) have unknown pull information.
Of the remaining population of 3,677 cables (3,911-234) which have cable pull records, none of the cables were identified to have undergone mechanical assisted pull.
As indicated, there were 215 cables for which no pull card could be found and 19 pull slips that were not marked to show if a mechanical assisted pull was used. Two hundred and thirty (230) cables were either multiconductor cables or they were not in a three single conductor (3-1/C) configuration in conduit; therefore, these cables were not susceptible to jamming. The remaining 4 cables, which were either #10 or #12AWG, were installed in conduits with three single conductor cables. The jamming ratio was calculated for each of these. The calculated jamming ratios are 2.08 for 3-1/C #12 AWG and 4.4 for 3-1/C #10 AWG. These ratios are outside the critical jam ratio of 2.6-3.2; therefore, cable jamming is not a concern for these 4 cables.
The details of TVA's evaluation are available at the site for review. This completes the open action required for licensing (#3) from Reference 7, Enclosure 3.
I declare under penalty of perjury that the foregoing is true and correct. Executed on the 18th day of May, 2009.
If you have any questions, please contact me at (423) 365-2351.
Sincerely, Masoud B j stani Watts Ba U it 2 Vice President Enclosure cc (See page 4):
U. S. Nuclear Regulatory Commission Page 3 May 18, 2009
References:
- 1.
NRC Safety Evaluation Report Related to the Operation of Watts Bar Nuclear Plant, Unit 2 NUREG-0847 Supplement 21, February 2009
- 2.
TVA letter dated May 29, 2008, "Watts Bar Nuclear Plant (WBN) -
Unit 2 - Cable Issues Corrective Action Program for Completion of WBN Unit 2" (T02 080529 001)
- 3.
TVA letter dated September 26, 2008, "Watts Bar Nuclear Plant (WBN)
- Unit 2 - Regulatory Framework for the Completion of Construction and Licensing Activities for Unit 2 - Corrective Action and Special Programs, and Unresolved Safety Issues" (T02 080926 001)
- 4.
NRC letter dated November 25, 2008, "Watts Bar Nuclear Plant - Unit 2
- Request for Additional Information Regarding Cable Issues Corrective Action Program (TAC NO. MD9182)" (A02 081203 001)
- 5.
TVA letter dated January 14, 2009,"Watts Bar Nuclear Plant (WBN) -
Unit 2 - Response to Request for Additional Information Regarding Cable Issues Corrective Action Program (TAC NO. MD9182)"
(T02 090114 001)
- 6.
2009/03/17 - Slides and Handouts from TVA Public Meeting (ADAMS Accession No. ML090771062)
- 7.
TVA letter dated April 6, 2009,"Watts Bar Nuclear Plant (WBN) - Unit 2
- Additional Information Regarding WBN Unit 2 Corrective Action Programs (TAC NO. MD9182 and MD9424)" (T02 090406 001)
U. S. Nuclear Regulatory Commission Page 4 May 18, 2009 Enclosure cc (Enclosure):
Lakshminarasimh Raghavan U.S. Nuclear Regulatory Commission MS 08H4A One White Flint North 11555 Rockville Pike Rockville, Maryland 20852-2738 Patrick D. Milano, Senior Project Manager (WBN Unit 2)
U.S. Nuclear Regulatory Commission MS 08H4 One White Flint North 11555 Rockville Pike Rockville, Maryland 20852-2738 Loren R. Plisco, Deputy Regional Administrator for Construction U. S. Nuclear Regulatory Commission Region II Sam Nunn Atlanta Federal Center, Suite 23T85 61 Forsyth Street, SW, Atlanta, Georgia 30303-8931 U. S. Nuclear Regulatory Commission Region II Sam Nunn Atlanta Federal Center 61 Forsyth Street, SW, Suite 23T85 Atlanta, Georgia 30303-8931 NRC Resident Inspector Unit 2 Watts Bar Nuclear Plant 1260 Nuclear Plant Road Spring City, Tennessee 37381 Example Certificate of Compliance
a.--...
CERTIFIED TEST REPORT AND CERTIFICATE OF tOMPLIANCE THE OKONITE COMPANY Report Nor 6328 O 2276 ROWESVILLE ROAD DATE: 03/31104 ORANGEBURG SC 29115 Roo No A2.5405 Pages I of *.29_.
Customen. TENNESSEE VALLEY AUTHORITY NUCLEAR Customer Order Number. 31967 Item No: i Code No: WNB-.2i CBR2B7A Manufetoutwn Order No: 04-2939-1 Produot Code No: 116.23-2028 Manufloturlng Spe: IVAN E12.6.01 REV 4 7121/03 Cable DOescrptlon:
1/C 2/0 19X COPPER.a3-140 OKOGUARD EPR-024 SC EPR-005 TINNED COPPER TAPE-080 OKOLON-SEQPRINT-SKV CERTIFICATE OF COMPLIANCE: Issued In conjunocton with and subject to OKONITE's standard Worranty and Limitation Liability.
THE OKONITE COMPANY hereby cartifles to the customer named above that the above descibed materals were duly tested during manufacture and that t materials meet or exoeWl the applicable requirements.
Qlantity Quantity Acoapted Number Oristed 6,000 for Shlpment 6.120 of Reels 2
Cable QC Shipping Squential Numbers Lenglh No.
Footage Top End Test Hole End 474307A 3060 4006168 4003100 474307B 3060 4003088 4000000 I
CERTIFIED TEST REPORT The Insulated conduotor(s) withmtood the following tests:
28 Kv Ac for 5 Min The Insuled oable conductor(s) has an INSULATION REI18STANCE of not lees ten hat#oonspondng to a constant of 50O at 115.6 C.
The DC RESISTANCE of the conductor(s) at28 C does not exceed MCEA values of 0.08260 Ohms per 1,000 ft.
Conductor Continuity PASSED Shield Contnuity PASSED Corona Level perAGIC 0C8 PASSED This report covers material shipped frm ORANOEBURG, SC to TVAN IBROWN$ PERRY We hereby cedg this to be a true and accurate 6opy of resulls of tests conducted In acCordanoe with orders and specifications Ited.
Special Settements for this CTR/COC "CABLES SHIPPED ARE A*AE IN DESIGN AND MATERIALS, AND MANUFACTURED UNDER SAME PROCESS AND QUALITY CONTROLS AS CABLE QUAUFIED BY OKONITE EQ REPORT NQRN 3 R4
- MAXIMUM BIDE WALL PRESSURE DURING INSTALLATION a 100ILBB."
'REELS ARE SUITABLE FOR EXPOSURE TO AN OUTDOOR ENVIRONMENT FOR AT LEAST TWO YEARS.-
hCABLE SUPPLIED IN ACCORDANCE WITH OKONITE Q8 MANUAL REV.5 DTD 8197.0 THE OKONITE COMPANY uSOFT I ANNEALED COPPER WIRES PRODUCED FOR STRANDED CONDUOTORS HAVE ACHIEVED ELONGATION AND FINISH REQUIREMENTS OF ASTM BS DURING MANUFACTURE.'
DON HOLýHUH "CABLE SHIPPED MEETS FLAME RESISTANCE REQUIREMENTS ENGINEER I MANAGER OF TEST OF IEEE 383-1974" 0-123-C-el REV 11.2 02/20102 S
?03q. Ej(.-I Re-4.
I Z
. I k
THE OKONITE COMPANY
- Ramsey, New Jersey 07446 May 1, 2009 Maximum Sidewall Pressure CERTIFICATION for TVA OKOGUARD SHIELDED OKOLON SPEC.
NO.
SSE 12.6.01 REV.
4 7-21-03 TVA PO# 31957 OKONITE F.O.-04-2839-l Product Code: 115-23-2928 Okonite certifies that the recommended maximum sidewall pressure (tension out of the bend expressed in pounds divided by the inside radius of the bend) for the single conductor 2/0 AWG Okoguard shielded Okolon 8 kV cable provided for the aforementioned order is as follows:
Pulling two or more cables (parallel or plexed): 1000 pounds per foot of radius Vice President Application Engineering ENGCERT/09011