RNP-RA/02-0172, Steam Generator Tube Plugging During Refueling Outage 21

Steam Generator Tube Plugging During Refueling Outage 21

ML023170211
Person / Time
Site:	Robinson
Issue date:	11/11/2002
From:	Baucom C Carolina Power & Light Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RNP-RA/02-0172
Download: ML023170211 (3)

Text

TS 5.6.8a SCP&L SProgress Energy , , ,:,

Serial: RNP-RA/02-0172 NOV I 12002 United States Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT NO. 2 DOCKET NO. 50-261/LICENSE NO. DPR-23 STEAM GENERATOR TUBE PLUGGING DURING REFUELING OUTAGE 21 Ladies and Gentlemen:

In accordance with the H. B. Robinson Steam Electric Plant, Unit No. 2, Technical Specifications Section 5.6.8, "Steam Generator Tube Inspection Report," Paragraph a, Carolina Power & Light Company submits the attached report on steam generator tube plugging during Refueling Outage 21.

The steam generator tube plugging was completed on October 29, 2002.

If you have any questions concerning this matter, please contact me.

Sincerely, C. T. Baucom Supervisor - Licensing and Regulatory Programs CAC/cac Attachment c: NRC Resident Inspector, HBRSEP L. A. Reyes, NRC, Region II R. Subbaratnam, NRC, NRR

United States Nuclear Regulatory Commission Attachment to Serial: RNP-RA/02-0172 Page 1 of 2 H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT NO. 2 STEAM GENERATOR TUBE PLUGGING DURING REFUELING OUTAGE 21 Steam Generator Tube Comments A R37C50 Wear is at top of tubesheet at hot leg side due to transient loose part. No loose part was determined to be present. This tube was last examined during Refueling Outage (RO) 19 in 1999 and there has been a slight change in the indication. The indication depth is below plugging limit required by the Technical Specifications. The indication was bounded by inspection of the surrounding tubes. The tube was preventatively plugged.

A R38C50 Wear is at top of tubesheet at hot leg side due to transient loose part. No loose part was determined to be present. This tube was last examined in 1999 (RO-19) and there has been a slight change in the indication. The indication depth is below plugging limit required by the Technical Specifications. The indication was bounded by inspection of the surrounding tubes. The tube was preventatively plugged.

A R37C51 Wear is at top of tubesheet at hot leg side due to transient loose part. No loose part was determined to be present. This tube was last examined in 1996 (RO-17) and there was no indication present. The indication depth is below plugging limit required by the Technical Specifications. The indication was bounded by inspection of the surrounding tubes. The tube was preventatively plugged.

A R4C39 Indication is attributed to mechanical wear. No loose part was determined to be present. This tube was last examined in 1996 (RO-17) and there was no indication present. The indication depth is below plugging limit required by the Technical Specifications. The tube was preventatively plugged.

B R1C27 Peripheral tube in blowdown lane with mechanical wear. The cause of this indication was attributed to impact by maintenance equipment. The indication correlates with equipment insertion down the blowdown lane.

The tube was preventatively plugged.

United States Nuclear Regulatory Commission Attachment to Serial: RNP-RA/02-0172 Page 2 of 2 Steam Generator Tube Comments B R34C43 Indication is attributed to wear due to loose part. The loose part was determined to be still present. The indication was bounded by examining surrounding tubes, with no other indications found. The tube was preventatively plugged and staked.

B R24C65 Indication is attributed to wear at the flow distribution baffle on hot leg side. No loose part was determined to be present. This tube was last examined in 1998 (RO-18) and there was no indication present. The indication depth is below plugging limit required by the Technical Specifications. The tube was preventatively plugged.

C R45C41 Wear is below the 6"' support plate on the hot leg side and is indicative of transient loose part wear. No loose part was determined to be present.

This tube was last examined in 2001 (RO-20) and there was no indication present. Adjacent tubes were examined, with no indications or loose parts found.