ML20091P427

Final Part 21 Rept Re Regular Locknut Being Installed on Governor Where Thinner Locknut Required at Calvert Cliffs. Applications of Thick Nut P/N 75233A06 on Control Linkages Will Be Reviewed to Insure Applications Correct

ML20091P427
Person / Time
Site:	Calvert Cliffs
Issue date:	08/24/1995
From:	Grandusky E DRESSER-RAND CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-PT21-95 NUDOCS 9509010203
Download: ML20091P427 (3)

Text

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e 1 Form EF-066 '

l Rav B REPORT NO. 39 Nuclear NNSOP 1.2.001 -

FINAL REPORT 10CFR PART 21 pg. 1 REPORTING OF DEFECTS AND NON-COMPLIANCE PREPARED BY: Ed Grandusky File No.: F-36674 A/B/C/D TITLE: Nuclear Product Engr. T-36674 A/B/C/D Serial No..

DATED: 8/24/95 Type: GS-2N TIME: 4:30 MPM RM-  %

j D R Part No.: 75233A06 PART NAME: Nut, Lock-Flexloc Reg Hgt. D-R Dwg. Noj 75233A D

Rev. Level: i

1. Description of Defect or Non-Compliance

4 Regular locknut, SPS-Flexloc no. 21FA616, D-R p/n 75233A06 may i be installed on governor valve linkages where the thinner locknut, SPS-Flexloc no. 21FK616, D-R p/n 75232A06 is required.

See Attachment. Pg. as required

2. Safety Hazard Created or Non Compliance: j

, Inadequate thread engagement in the thicker locknut may result in linkage separation if the nut loosens from vibration and spins

' off. This will result in loss of turbine control capability. I See Attachment. Pg. as required i

3. Number and Location of all such components which contain this defect or fail to comply with 10CFR21:

One confirmed misapplication at Calverts Cliffs.

j i See Attachment. Pg. as required l\

4 Corrective Action by the following individual Ed Granduni:" By Date 9-15-95 All applications of thick nut p/n 75233A06 on control linkages will be reviewed to insure there application is correct.

See Attachment. Pg. as required

5. Advice to Customer related to defect or non-compliance:

Inspect all applications of locknuts on the control linkage for full thread engagement in locknut. (

2 See Attachment. Pg. as required

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• All threads in the locknut must be engaged by the threads on i the pin. Amount of exposed threads will vary with application.  !

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TYPICAL ASSEMBLY ,

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FINAL REPORT.10CFR PART 21 REPORT NO. 39 pg. 2 1

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