ML20128A371

Ack Granting Temporary Waiver of Compliance from TS 4.4.5.2, Table 4.4-2, SG Tube Insp, to Allow Continued Plant Operation in Light of Missed Insps on Two SG Tubes,Per Util

ML20128A371
Person / Time
Site:	Arkansas Nuclear
Issue date:	11/27/1992
From:	Virgilio M Office of Nuclear Reactor Regulation
To:	Yelverton J ENTERGY OPERATIONS, INC.
References
NUDOCS 9212030308
Download: ML20128A371 (5)

Text

'9, UNITED STATES 8 o- NUCLEAR REGULATORY COMMISSION t, WASHINGTON, D C. 20555

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- k....+,/;y Novemt;er 27, 1992 Docket No. 50-368 Mr. Jerry W. Yelverton Vice President, Operations ANO Entergy Operations, Inc.

Route 3 Box 137G Russellville, Arkansas 72801

SUBJECT:

REQUEST FOR TEMPORARY WAIVER OF COMPLIANCE -' TECHNICAL SPECIFICATION (TS) 4.4.5.2, TABLE 4.4-2, STEAM GENERATOR (SG) TUBE INSPECTION -

ARKANSAS NUCLEAR ONE, UNIT 2 (ANO-2)

This acknowledges the granting of a temporary waiver of compliance to AN0-2 from the provisions of TS 4.4.5.2, Table 4.4-2, " Steam Generator Tube m Inspection", to allow continued op9 ration of ANO-2 in light of missed inspections of two SG tubes. Your letter dated November 27, 1992, which describes the condition where two tubes in the "B" SG were not inspected with the bobbin coil probe during the ninth refueling outage (2R9, ending.0ctober .

1992), provides the written basis for the temporary waiver of complianc.e.

A temporary waiver of compliance was verbally granted on November 27, 1992, by

RC's Office of Nuclear Reactor Regulation (NRR), with the concurrence of NRC's Region IV Office. The waiver is effective for up-to 90 days, until a TS license amendment can be submitted and processed. The waiver was granted with the understanding that you will submit a TS license amendment request >'ithia 30 days regarding TS 4.4.5.2, Table 4.4-2, and the missed inspection of the two SG tubes. ,

This letter also acknowledges that an additional 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> delay was verbally granted by NRC on November 25, 1992, to extend the TS 4.0.3 time limit for:

this condition from 24 to 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.

, NRR performed an evaluation of your written. documentation and found that it justified the basis for your request for a . temporary waiver of compiiance. .As indicated in your letter, both tubes were inspected in 2R8 (March-1991) and there war no _ detectable degradation on-either tube. . Also, the 2R9 eddy current data for 28 tubes surrounding the two missed tubes (two rows of tubes around each of the two missed tubes) revealed only one indication-(28 percent :-

throughwall) in one of these 28 tubes. The 2R8 and 2R9 data bases were also reviewad'to determine the maximum growth for both eggcrate and batwing.

supports. Based on the 2R8 exam of these two tubes showing no detectable degradation and applying maximum growth rates, development of a flaw in either of these tubes that would challenge Regulatory Guide 1.121 limits is not expecte' .0 occur before the next SG inspection. Additionally, no concerns

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.Mr. Jerry W. Yelverton exist for circumferential cracking at the top of the tubesheet region of these tubes, since they were examined with the rotating pancake coil during 2R9.

With regards to compensatory mcasures, ANO-2 is currently operating at a reduced hot leg temperatura to mitigate the consequences of intergrannular stress corrosion cracking, a SG tube damage mechanism. SG tube leaks would be detected and confirmed by the main steam line N-16 monitors, condenser off-gas monitor, SG blowdown tonitors, main steara line radiation monitors, chemistry analysis, or reactor coolant system inventory balance. Also, ANO-2 has an administrative primary-to-secondary leakage limit of 0.1 gallon-per-minute (GPM), below the TS value of 0.5 GPM for leakage through any one SG.

Additionally, ANO-2 operator continuing training routinely stresses identification and mitigation of SG tube leaks by way of procedure review, classroom instruction and ongoing participation in simulator scenarios, and shif t briefings are being conducted to ensure cperations personnel are aware that two tubes in the "B" SG were not tested.

As indicated by your staff on November 27, 1992, we understand that the ANO Plant Safety Committee reviewed and approved the basis of your proposed request for a temporary waiver of compliance prior to requesting this waiver from NRC. If your understanding of this matter differs from that expressed above, or if you have any questions renarding this matter, please contact me.

Sincerely, ORIGINAL SIGNED BY JOHN T. LARKINS FOR:

Martin J. Virgilio, Assistant Director for Region IV and V Reactors Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation 0FC LA:PD4-1 PM:PD4-l a D:PD4'-h An;gygy NAME Ploir$ai[N ' TAlexioM JLYrbffs IkNkfa DATE 11gr/92 11/ U /92 11/)1/92 11/,2 /92

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iir. Terry W. Yelverton exist for circumferential cracking at the top of the tubesheet region of these tubes, since they were examined with the rotating pancake coil during 2R9.

. With regards to compensatory measures, AND-2 is currently operating at a reduced hot leg temperature to mitigate the consequences of intergrannular stress corrosion cracking, a SG tube damage mechanism. SG tube leaks would be detected and confirmed by the main steam line N-16 monitors, condenser off-gas monitor, SG blowdown monitors, main steam line radiation monitors, chemistry analysis, or reactor coolant system inventory balance. Also, ANO-2 has an -

administrative primary-to-secondary leakage limit of 0.1 gallon-per-minute (GPM), below the TS value of 0.5 GPM for leakage through any one SG.

Additionally, ANO-2 operator continuing training routinely stresses identification and mitigation of SG tube leaks by way of procedure review, classroom instruction and ongoing participation in simulator scenarios, and shift briefings are being conducted to ensure operations personnel are aware that two tubes in the "B" SG were not tested.

As indicated by your staff on November 27, 1992, we understand that the AN0 Plant Safety Committee reviewed and approved the basis of your proposed request for a temporary waiver of compliance prior to requesting this waiver from NRC. If your understanding of this matter differs from that expressed above, or if you have any questions regarding this mat +ar, please contact me.

Sincerely,

&L 4 Man in J. .Virgilio, Assistant Director for Region IV and V Reactors Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation cc: See next page i

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Mr. Jerry W. Yelverton cc:

Mr. Donald C. Hintz, President Mr. John R. McGaha and Chief Operating Officer Vice President, Operatic , Support Entergy Operations, Inc. Entergy Operations, Inc.

P. 0. box 31995 P. O. Box 31995 Jackson, Mississippi 39286 Jackson, Mississippi 39286 Mr. Robert B. McGehee Mr. Jerry Yelverton Wise, Carter, Child & Caraway General Manager, Plant Operations P. O. Box 651 Entergy Operations, Inc. Jackson, Mississippi 39205 Route 3 Box 137G Russellville, Arkansas 72801 Mr. Charles B. Brinkman, Manager Washington Nuclear Operations Mr. Nicholas S. Reynolds ABB Combustion Engineering Nuclear Power Winston & Strawn 12300 Twinbrook Parkway, Suite 330 1400 L Street, N.W. Rockville, Maryland 20852 Washington, D.C. 20005-3502 Mr. James 0. Fisicaro Mr. Robert B. Borsum Director, licensing Licensing Representative Entergy Operations, Inc.

B&W Nuclear Technologies Route 3, Box 137G 1700 Rockville Pike, Suite 525 Russellville, Arkansas 72801 Rockville, Maryland 20852 Admiral Kinnaird R. McKee, USN (Ret) l Senior Resident inspector 214 South Morris Street U.S. Nuclear Regulatory Commission Oxford, Maryland 21654 1 Nuclear Plant Road Russellville, Arkansas 72801 Regional Administrator, Pagion IV U.S. Nuclear Regulatory ismmission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 Honorable Joe W. Phillips County Judge of Pope County l Pope County Courthouse i Russellville, Arkansas 72801 Ms. Greta Dicus, Director Division of Radiation Control and Emergency Management Arkansas Department of Health 4815 West Markham Street Little Rock, Arkansas 72205-3867

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Docket. File ~

NRC PDR Local PDR TMurley FHiraglia JPartlcw JRoe MVirgilio PNoonan TAlexion

, 0GC DHagan GHill (4)

Wanda Jones CGrimes JRichardson ACRS (10)

OPA OC/LFDCB PD-IV-1 Plant File PDIV-! Reading JLieberman, OE Eleeds MBoyle BJohnson, Region IV l

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