ML070440481

Main Stack Inspection Report - 05/08/2006

ML070440481
Person / Time
Site:	Pilgrim
Issue date:	05/08/2006
From:	Broadcast Tower Service
To:	Office of Nuclear Reactor Regulation
References
Download: ML070440481 (19)

Text

9 knterrrv Main Stack Inspection Report 5/08/06

Inspection completed for:

Entergy Pilgrim Nuclear Power Plant Rocky Hill Road Plymouth, MA 02360 5/08/06

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Tower Service, inc.

Inspection completed by:

Broadcast Tower Service Inc.

10 Jillians Way Bridgewater, MA 02324 Phone: 508-326-9485 Fax: 508-427-1756 Christopher Loycano President

Attachment 2 sheet I of 2 Work Sheet No. 2 - Augmented Scope Guy Wire Tensions and Stack Alignment

[I]Measure existing guy wire tensions with a calibrated device provided by Engineering.

Provide the following date:

North Guys: Date: 5/08/06 Start of shift: Temp. 50 degrees F. Wind Speed: 3 Mph Direction: jj Guy Tensions: 718 86001bs 1-114 12.0001bs 1-318 14.0001bs End of Shift: Temp. 53 degrees Wind Speed: 4.6 Mph Direction: NE West Guys: Date: 5/08/06 Start of Shift: Temp. 54 Degrees Wind Speed: 3 Mph Direction: N Guy Tensions: 7/8 9,0001bs 1-1/4 12,1001bs 1-318 15,4001bs End of Shift: Temp. 56 degrees Wind Speed: 5 Mph Direction: NW South Guys: Date: 5/08/06 Start of Shift Temp. 56 degrees Wind Speed: 5 MDh Direction: NW

( Guy Tensions: 7/8 8,6001bs 1-114 12,2001bs 1-3/8 16,3001bs End of Shift: Temp. 57 dearees Wind Speed: 14 Mph Direction:=

Attachment 2 Sheet 2 of 2

[2] Measure existing stack alignment from positions on two azimuths approximately 90 degrees apart with a calibrated device approved by Engineering. Alignment data shall be the horizontal deflection from plumb at each guy location referenced to the stack base.

Furnish a sketch showing locations chosen for instrumentsetup and provide the following data:

Position A (Instrument in North East quadrant, looking South West)

Start of shift: Temp. 63 Wind Speed: 15 Direction: 233*

Deviation: El. 165ft 0 e1.265ft 0 El. 365ft 1 West End of Shift: Temp. 63 Wind Speed: 15 Direction: 233*

Position B (Instrument in South East quadrant, looking Northwest)

Start of shift: Temp. 57 Wind Speed: 14 Direction: 227 Deviation: El. 165ft Q El. 265ft 1 East El. 365ftJ

c- 7/118106-7/19/06 Attachment 4 Enclosure 2- Guv Wire Retensioninsr Final Results Start of Work:

Air Temperature: 89 degrees F. Wind Speed: 8 Mph Wind Direction: S 70 denrees F. 3.7Mph -

N North Guv Tensions:

Lower (718) 8.9001bs Middle (1-114) 12,000lbs Upper ( 1-318) 16,8001bs Down One Turn Up One Turn West Guv Tensions:

Lower (718) 9,0001bs Middle (1-114) 12,1001bs Upper (1-318) 16,800lbs Up Two Turns Up Two Turns South Guv Tensions:

Lower (718) 9.0001bs Middle (144) 12,2001bs Upper (1-3/8) 16,8001bs End of Work Air Temperature: 89 degrees F. Wind Speed: 14 Mph Wind Direction: SSW 69.6 degrees f. 9.2 Mph -

N 3.M.5-2 Rev.10

ENCLOSURE 3 - STACK ALIGNMENT AFTER GUY WIRE RETENSIONING Instruction: Show to scale a point with dimensions representing the position of the centerline of the stack at the guy location, with respect to centerline of the stack at the base, in the applicable quadrant. In this case the stack "base" is the lowest visible elevation which can be seen from the set-up locations of the optical survey instruments.

NOTE North is defined by the PNPS convention shown on Drawing C322A, which differs from true north.

Initial Condition: As-found deflection with respect to the stack base Lower Guv Attachment Middle Guv Attachment Utmer Guv Attachment N N N

/-

i A

W E 0" w E 0" w Lower Guv Attachment Middle Guv Attachment Umer Guv Attachment N N N 0"

3.M.5-2 Rev. 10 I Page 22 of 22

RTYPE H6.03 PILGRIM NUCLEAR POWER STATION Procedure No. 3.M.5-2 MAIN STACK INSPECTION GUIDELINE A stop Think Act Review REFERENCE USE I c ..

030395

4.0 DISCUSSION

(-'

The Main Stack is constructed from 30" diameter by 5/8"thick steel pipe and is supported atop the Main Stack Fiiter Building, located about 700 feet northwest of the Reactor Building. Its top elevation is approximately 400 feet above mean seawater level. It is laterally supported at three different elevations by three guy wires 120 degrees apart. Each guy wire is connected to the stack at the upper end and fastened to a concrete anchor block at the ground level. Guy wire tensions must be maintained within acceptable ranges to limit stack deflections and stresses under design basis wind loading.

5.0 SPECIAL TOOLS AND EQUIPMENT Transit (or equal) to check stack alignment (Augmented Scope only)

\rz/ Shunt type dynamometer (or equal) to check guy wire tension (Augmented Scope only)

[3] Access to wind speed, direction, and air temperature data (Augmented Scope only)

/ Binoculars for visual inspections of unreachable locations above ground level

[/Radios and phone for emergency communications

'

[ W S a f e t y equipment for worker protection when climbing

'- Lz/ Camera 6.0 QRECAUTlONSAND LIMITATIONS safety precautions shall be observed at all times while performing inspection:

Authorization must be obtained from the SM prior to the inspection.

General condition inspection should be performed by experienced and trained personnel using proper safety equipment (PNPS 1.4.54).

Personnel climbing the stack ladder shall use a full body harness and center rail ladder

&"' /

climbing device and have a means of communication (preferrably radiolphone) with ground personnel.

Ground personnel shall he equipped with a radiolphone to permit communications with climbers and the Station.

3.M.5-2 Rev. 9 Page 5 of 14

Sheet 1 of 3

,d&233 WORK SHEET NO. 1 - BASIC INSPECTION 7iy II)

CONDITION OF GUY WIRES, CONNECTIONS, AND STACK EXTERIOR SURFACES Perforin the following inspections and provide descriptions and photographs of all conditions determined to be unsatisfactory.

[I] At each reinforced concrete deadman anchor block, inspect the concrete block for evidence of cracking, spalling, or any other form of deterioration. Inspect the surrounding ground area for evidence of block movement, soil erosion, interfering vegetation growth, or any other unusual conditions.

North Block Sat [ 4 Unsat[ ]

West Block Sat [ Unsatf ]

South Block Sat[ J1 Unsat[ 3

[2] At each reinforced concrete deadman anchor block, inspect the 2thick embedment plate, the threaded eye bars and cotter pins, wire rope bridge sockets, vibration dampers, and electrical ground wire connections for each of the three guys for coating I failure, corrosion, pitting, loose parts, damage, evidence of deformation, movement or wear, or any other unusual conditions.

North Block Sat [ 4 Unsat [ ]

West Block Sat 1 4 Unsat[ ]

South Block Sat[ J I Unsatl 1

[3] At the guy wire attachment points to the main stack, inspect the connection plates and the open wire rope sockets and cotter pins for each of the three guy wires for coating failure, corrosion, pitting, damage, evidence of deformation, movement or wear, or any Gther unusual conditions.

Guv 63 El. 165ft Sat[d Unsat[ ]

Guv @ El. 265 ft Sat [ 4 Unsat [ ] - gtrh&- sc,.,+L, u3 Guv 63 El. 365 fl Sat [ ..j Unsat ] pj$.- JLJ+,

3.M.5-2 Rev. 9 Page 9 of 14

141 At each of the nine guys, inspect the entire length of the wire for corrosion, damage, interfering vegetation growth, evidence of deformation or wear, broken strands, or any other unusual conditions.

718 Guy @ North Block Sat [ Unsat [ ]

1-1/4 Guy @ North Block Sat [ Unsat [ ]

1-3/8Guy @ North Block Sat [ 4 Unsat [ ] I 7/8 Guy @ West Block Sat[ 4 Unsat[ 1 I 1-1/4 Guv @ West Block Sat [ vf Unsat [ ]

1-318Guy @ West Block Sat [ 4 Unsat [ ]

7/8 Guy @ South Block Sat [ L/r/ Unsat [ ] I 1-1/4 Guy @ South Block Sat [ Unsat [ ]

1-3/8Guv @ South Block Sat [ 4 Unsat [ ]

I I [5] At all main stack pipe sections, inspect bolted connections for coating failure, corrosion, i -I pitting, loose fasteners, damage, evidence of deformation, movement or wear, or any other unusual conditions:

Stack Base and Seven Bolted Flanqes (Ref: Dwq C332A. Details 2 and 7)

Base @ El. 95 Sat[ 4 Unsat[ ]

Flange @ El. 136 Sat[v] Unsat [ J ru,-t/b&Lh Flange @ El. 177.75 Sat [ Unsat [ ]

Flange @ El. 219.54 Sat [ Unsat [ 1 Flange @ El. 261.33 Sat [ Gj Unsat [ ] - py,Ld flJs -

Flange @ El. 303.05 Sat [ 4 Unsat [ ]

Flange @ El. 344.81 Sat [d Unsat [ ]

Flange @ El. 386.59 Sat Q] Unsat [ ]

3.M.5-2 Rev. 9 Page 10 of 14

.

[6] Inspect pipe segment exterior surfaces for coating failure, corrosion, pitting, damage, or any other unusual conditions:

El. 177.75to 219.54 Sat [ u] Unsat[ ] I 7L El. 219.54 to 261.33 El. 261.33 to 303.05 El. 303.05 to 344.81 Sat [

Sat [

Sat [d Unsat [

Unsat [

Unsat [

]

• bLf/F--L-Qdf 1 p d ~ -/4d $ y

]

bd c I I

I El. 344.81to 386.59 Sat [ 4 Unsat [ ] 3~dv-y/ p l - h

• I El. 386.59 to 400 Sat [d] Unsat[ ] 1

[TI Engineering Review

/-

c Evaluation of Conditions Identified as Unsatisfactory by the Basic Inspection:

Condition:

Evaluation:

Condition:

Evaluation:

Condition:

Evaluation:

Prepared by:

Mechanical/CiviJ/StructuraIEngineer Date Reviewed by:

Mechanical/Civil/St ructuraI Mgr Date 3.M.5-2 Rev. 9 Page 11 of 14

Prior to performing specific tasks, the performer will:

[I] Complete the following for personnel who sign for steps being completed in Section 7.0:

(r' Name (print) InitiaIs

-

[Z] Notify and obtain permission from the SM immediately prior to starting work. 3, Wfie&+u&

x. (2-0 s/17./0e

[3] Notify the Safety Coordinator.

L. q).G qfi7(0(0 itials (41 Verify with Maintenance MT&E that the guy wire tension measuring equipment is properly cafibrated. (Augmented Scope only)

[5] Notify Radiation

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,

[SI Notify the Security Shift Commander.

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[7] Notify Engineering (CiviVStructural).

6 Dp+-f-J 3.M.5-2 Rev. 9 Paae 6 nf 14

f Enteray South Anchor

c Enteray Flakina Paint

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MANUFACTURER MODEL SERIAL NUMBER I 1 Lid& b..b ( 9 6 I ' I I y 0 6 Authorized Sbnature Date 0.L.Makepeace, Inc. 125 Guest Street, Brighton, MA 02135 800.835.0194