ML040550033
| ML040550033 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 02/20/2004 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| References | |
| Download: ML040550033 (13) | |
Text
Calvert Cliffs Unit 1 Refueling Outage Spring 2004 Reactor Vessel Head Inspections Calvert Cliffs Nuclear Power Plant, Inc.
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Agenda Calvert Cliffs Unit 1 Refueling Outage Spring 2004
- Meeting Objectives - M. Milbradt
- Executive Summary - M. Milbradt
- Inspection Scope - J. Haydin
- Summary - M. Milbradt 2
Obj ectives Calvert Cliffs Unit 1 Refueling Outage Spring 2004
- Common understanding of CCNPP approach to inspection
- Common understanding of CCNPP nozzle configuration
- Common understanding of Regulatory Compliance 3
Calvert Cliffs Unit 1 Refueling Outage Executive Summary Spring 2004
- Unit 1 and Unit 2 heads have similar nozzle configuration
- Relaxation granted for Unit 2
- Plan same inspection approach on Unit 1 which will ensure structural integrity
- We will comply with the order. We plan on submitting a relaxation request in January.
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Reactor Vessel H1ead-In sul ati on Calvert Cliffs Unit 1.
Refueling Outage Spring 2004 Removable 0
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Bare Metal Visual Inspection Calvert Cliffs Unit 1 Refueling Outage Spring 2004
- Unit 1 Exam - Spring 2002 results
- 100% visual examination of all penetrations
- No indications of leakage
- No indications of head wastage 6
Bare x
- 1Calvert Cliffs Unit 1 Refueling Outage Spring 2004 Inspection Unit 1, 2004 Visual Examination Plan Same approach as 2002
- Same vendor and technique Acquire visual inspection data on every penetration and the rest of the surface 1AW the Order
- Previous exam identified minor amounts of extraneous material (covering a few square inches of head) which we intend to move to permit fill surface examination
Head Configuration Calvert Cliffs Unit 1 Refueling Outage Spring 2004 180 74 Total Penetrations 8 In-core Instruments (ICI)s 2r I Head Vent 65 Control Element Drive Mechanisms (CEDM)s 8
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CEDM Nozzle Detail Centering Tab l
Calvert Cliffs Unit 1 Refueling Outage Spring 2004 munterbore 0
J-groove weld Penetration
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Thermal Guide Sleeve 9
Calvert Cliffs Unit 1.
Refueling Outage Unit 1 Volumetric Exam Spring2004 Consistent with Unit 2 2003 exam
- CEDMs with stationary guide/thermal sleeves
- Blade Probe Ultrasonic Testing (UT)
- ICIs and vent line
- Rotating Probe UT
- Leak path determination
- Eddy Current Test (ET) vent line weld 10
Calvert Cliffs Unit 1.
Volumetric Inspection Refueling Outage Spring 2004
- Unit 2, 2003 Inspection Findings
- In some penetrations, thermal sleeve and penetration geometry prevented inspecting 2" above J-groove weld
- Probe configuration (over/under transducers) excluded bottom 0.5" of nozzle OD
- Unit 1 nozzle configuration is similar. We expect to achieve similar results to those achieved on Unit 2 11
Calvert Cliffs Unit 1.
Refueling Outage ozze Repa rs Spring 2004
- Remove a portion of the penetration nozzle and re-establish welded pressure boundary
- ICIs and Head Vent Nozzles
- Manually remove defect and re-weld 12
Calvert Cliffs Unit 1 Refueling Outage Summairy Spring 2004 Examination Goals 100% visual examination of the top of the vessel head including 360° around each penetration
- UT of Alloy 600 penetration material
- Leak path assessment of CEDMs and ICIs
- ET of Head Vent
- We will comply with the order. We plan on submitting a relaxation request in January.
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