ML17277B333

Request for Additional Information Prairie Island Special Heavy Lifting Devices LAR (CAC Nos. MG0072 and MG0073)

ML17277B333
Person / Time
Site:	Prairie Island
Issue date:	10/04/2017
From:	Kuntz R F Plant Licensing Branch III
To:	Gohdes P Northern States Power Co
References
MG0072, MG0073
Download: ML17277B333 (3)

Text

1 NRR-PMDAPEm Resource From: Kuntz, Robert Sent: Wednesday, October 04, 2017 12:34 PM To: 'Peter.Gohdes@xenuclear.com'

Subject:

Request for additional information RE: Prairie Island Special Heavy Lifting Devices LAR (CAC Nos. MG0072 and MG0073)Mr. Gohdes, By application dated August 4, 2017 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML17216A236), Northern States Power Company (the licensee) requested changes to the licensing basis for the Prairie Island Nuclear Generating Plant (PINGP) Units 1 and 2. The change would revise the PINGP Updated Safety Analysis Report (USAR) Section 12.2.12.3, "Special Lifting Devices Evaluation," to modify the non-destructive examination (NDE) inspection interval for special lifting devices from typically prior to each refueling outage to a ten year interval.

The NRC staff has determined that additional information is required to complete its review. The following is a request for additional information (RAI). The NRC staff expects a response to this RAI by November 7, 2017. If a response cannot be submitted as expected, contact me to discuss.

Robert Kuntz Senior Project Manager (Monticello and Prairie Island) NRC/NRR/DORL/LPL3 (301)415-3733 REQUEST FOR ADDITIONAL INFORMATION LICENSE AMENDMENT REQUEST TO REVISE THE NON-DESTRUCTIVE EXAMINATION INSPECTION INTERVAL FOR SPECIAL LIFTING DEVICES PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2 NORTHERN STATES POWER COMPANY DOCKET NOS. 50-282 AND 50-306 CAC NOS. MG0072 AND MG0073 By application dated August 4, 2017 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML17216A236), Northern States Power Company (the licensee) requested changes to the licensing basis for the Prairie Island Nuclear Generating Plant (PINGP) Units 1 and 2. The change would revise the PINGP Updated Safety Analysis Report (USAR) Section 12.2.12.3, "Special Lifting Devices Evaluation," to modify the non-destructive examination (NDE) inspection interval for special lifting devices from typically prior to each refueling outage to a ten year in terval. The current NDE inspection interval is consistent with American National Standard Institute, (ANSI) N14.6-1978, "American National Standard for Special Lifting Devices for Shipping Containers Weighing 10,000 Pounds (4500kg) or More for Nuclear Materials," and NUREG-0612, "Control of Heavy Loads at Nuclear Power Plants" (ADAMS Accession NO. ML070250180) 2 The U.S. Nuclear Regulatory Commission staff has reviewed the August 4, 2017 submittal and determined that the following additional information is required in order to complete the review:

RAI-SBPB - 01:

The guidelines of Section 5.5 of ANSI N14.6-1978 specify that inspections of special lifting devices using liquid penetrant or magnetic particle examination shall be performed by procedures and personnel qualified in accordance with the rules in the current edition of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (BPVC),Section V. The guidelines of Section 5.5 of ANSI N14.6-1978 also specify that the acceptance standards for these examinations be as specified in the ASME BPVC,Section III, Division 1. As provided in Attachment 1 to the Enclosure provided with the amendment request dated August 4, 2017, Section 12.2.12.3, "Special Lifting Devices Evaluation," of the PINGP Updated Safety Analysis Report (USAR), Revision 35P, states the following:

In lieu of the surface NDE defined in ANSI N14.6-1978, a volumetric NDE using acoustic emission (AE) technique may be used. If indications are identified by AE, then supplemental ultrasonic (UT), Magnetic Particle (MT), or Liquid Penetrant (PT) techniques may be used for flaw characterization. (Reference 74)

This statement reflects a change from the latest PINGP USAR update submitted to the NRC (Revision 34, dated June 3, 2016 (ADAMS Accession No. ML16168A361)), and this change introduced the permitted use of the AE technique. Reference 74 is not included in Revision 34 to Section 12 of the PINGP USAR. Clarify the quality standards that apply to the procedures and personnel used in the performance of the AE and the acceptance criteria that apply to the examination results. Explain how the AE method of examination would provide detection sensitivity for likely weld defects or cracks that is equivalent to or better than magnetic particle and liquid penetrant examinations conducted as specified in Section 5.5 of ANSI N14.6.

RAI-SBPB - 02:

Attachment 2 to the Enclosure to the amendment request dated August 4, 2017, provided an evaluation of the past relevant indications from available special lifting device NDE results. The results presented include only indications identified through magnetic particle or liquid penetrant examinations of the PINGP, Unit 2 internals lifting rig. Explain why the fabrication defect identified in October 2015 would first be identified at that time, when the lifting rig had been in service for many years and had been subject to numerous inspections. Also, identify the last examination method used for each special lifting device and the date of that examination.

Hearing Identifier: NRR_PMDA Email Number: 3755 Mail Envelope Properties (16c49254eb8e48e5bd7826f46c6ac1ae)

Subject:

Request for additional information RE: Prairie Island Special Heavy Lifting Devices LAR (CAC Nos. MG0072 and MG0073) Sent Date: 10/4/2017 12:34:13 PM Received Date: 10/4/2017 12:34:14 PM From: Kuntz, Robert Created By: Robert.Kuntz@nrc.gov Recipients: "'Peter.Gohdes@xenuclear.com'" <Peter.Gohdes@xenuclear.com> Tracking Status: None

Post Office: HQPWMSMRS05.nrc.gov Files Size Date & Time MESSAGE 4976 10/4/2017 12:34:14 PM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: Recipients Received: