ML20137G364
| ML20137G364 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 08/16/1985 |
| From: | Warembourg D PUBLIC SERVICE CO. OF COLORADO |
| To: | Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| P-85239, NUDOCS 8508270277 | |
| Download: ML20137G364 (7) | |
Text
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Company of Colorado 16805 WCR 19 1/2, Platteville, Colorado 80651 August 16, 1985 Fort St. Vrain Unit No. 1 P-85239 5@
Regional Administrator Region IV U. S. Nuclear Regulatory Commission N o.d 5-611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 j, -
Attention: Mr. Eric H. Johnson Docket No. 50-267
SUBJECT:
Design Document Review
REFERENCE:
PSC Letter, Singleton to Johnson, dated May 21, 1985 (P-85172)
Dear Mr. Johnson:
The purpose of this letter is to inform you of the results of the independent Control Rod Drive Orifice Assembly (CRD0A) drawing and 0
& M Manual review which was to verify that applicable design requirements were incorporated into CRD0A Fuel Handi'ng Procedure Work Packet (FHPWP) procedures and CRD0A purchase orders. This independent review included 362 CRD0A assembly drawings and applicable sections of the 0 & M Manual in which 734 drawing notes were found to contain requiremer.ts which would apply to the installation, procurement and manufacture of CRD0A components. A total of 26 requirements, which relate to the Public Service Company Refurbishment Program, were found not to be fully implemented into the FHPWP procedures.
Additionally, seven (7) requirements were found not to be fully implemented in the purchase order requirements.
Each of these requirements are stated and addressed in Attachment A.
c The conclusion of this review is that all essential technical
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engineering requirements have been included in the aforementioned pf documents.
Furthermore, none of the omissions, additions or changes p
constitute a condition which would require rework.
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-g-If you have any questions, please contact Mr. M. H. Holmes at (303) 571-8409.
Very Truly Yours, 0/7 /%sd D. W. Warembourg, m Mahager Nuclear Engineering Division DW/DJ/ldr Attachment
Attachm:nt A August 16, 1985 Page 1 of 5 DESIGN REQUIREMENTS NOT FULLY IMPLEMENTED INTO THE FHPWP
RESPONSE
Note on drawing 01201-100F 150 ft. lbs. is acceptable as calls for hold down bolts to be a specified allowable value torqued to 120 - 130 ft. lbs.
for a lubed bolt of this size The FHPWP procedure specifies and type. A drawing change per bolts to be torqued to 150 CN-1986 has been made to reflect ft. lbs, the 150 ft. Ib. value.
No reference was concerning as The installation of these bolts and to the lock wiring of Item 42 lockwiring was performed under a and 43 on drawing 01201-100AE separate procedure by Public Service Company after the CRD0A had been returned to the core and is not covered by the current FHPWP.
Conflict of Notes 12 and 31 The jetlube contained in the notes on drawing D1201-100AE, has been removed as an approved where two separate lubrication lubricant per CN-1933A. CERAC requirements are specified SP111 and NE0 LUBE are approved per for fasteners.
this same CN. A drawing update was made per CN-1985 to correct the note discrepancy.
Note 18 on drawing D1201-3/4 of a turn meets the intent of 100AE calls for bolts to be the original note. Note will be backed off.65 to.75 turns updated by CN-1986 to reflect after torquing where the FHPWP this change, procedure calls for approxi-mately 3/4 turn.
The lock wiring table on A legible copy of the table drawing D1201-100AE Note F (Note F) has been implemented into is illegible.
the procedure. The illegible copy did not affect the work as the procedure was familiar to the mechanics.
Drawing Notes 1-6 of D1201-102 The bearings were not lubricated are not referenced in the per the procedure to 01201-102 procedure. These notes are a drawing specification. Testing procedure to lubricate instrument was performed on these bearings.
bearings.
Test data justifies, the use of the bearings and was compiled by GA Technologies and incorporated into CN-2097.
Attachment A August 16, 1985 Page 2 of 5 DESIGN REQUIREMENTS NOT FULLY IMPLEMENTED INTO THE FHPWP
RESPONSE
The FHPWP allows for an alternate The alternate method of determin-method of determining bearing pre-ing bearing preload is justified load from that specified in in CN-1933A and has been incor-drawing D1201-200U Note 13.
porated into the drawing notes per CN-1986.
The FHPWP does not mention clean The GGA specification RC 2-2 room requirements per drawing which meets the requirements of D1201-217F and 218G.
-217F and 218G is mentioned and conformed to in the FHPWP. The FHPWP procedure will be changed to specifically address the type of room / clean area, that was practiced during the refurbishment program.
GA drawing D1201-218G Note 6 This note was performed by the specifies the shim motor stator manufacturer during original to be encapsulated using a fabrication and does not apply mixture of shell Epon 828.
to the refurbishment program.
GA drawing D1201-218G Note 8 The parts were handled with lint specifies the handling of shim free gloves as governed by Health motor parts with lint free gloves Physics work procedures. The FHPWP during final assembly and is will be revised to specifically not specified in the FHPWP.
address the use of these gloves.
GA drawing D1201-218G Note 14 The use of " Loctite 242" is ap-specifies items to be locked per proved per CN-1933A as a locking GGA specification RM 3-1 while mechanism, which is required for the FHPWP calls for the use of use in the FHPWP. Drawing D1201-
" Loctite 242".
218 has been updated per CN-1986 to allow the alternate use of
" Loctite 242".
GA drawing D1201-218G Note 17 Molykote Z is an approved lubri-specifies the use of Molykote cant for use in CRD0A components 321 on the 0.D. of the outer and is acceptable for this ap-bearing race, while the FHPWP calls plication.
The drawing note was for the u:e of Molykote Z.
updated per CN-1986 to reflect this.
n Attachment A August 16, 1985 Page 3 of 5 DESIGN REQUIREMENTS NOT FULLY IMPLEMENTED INTO THE FHPWP
RESPONSE
The FHPWP specifies the use Molykote G was never used on of Molykote G on bearing races bearing races during the refurbish-and is not addressed in the ment program as all main drive drawing notes.
bearings were replaced with new bearings. The procedure will be revised to delete the use of Molykote G as it will not apply for future refurbishments.
GA drawing D1201-219F Note 9 Tightening of the bolts to specifies bolt to be torqued 25 to 30 in. 1bs. is within the to 8 in. 1bs. + in. lb.
range of the bolt torquing while the FHPWF calls for the specifications and was incorporated bolt to be torqued to 25 to into CN-1986.
30 in. Ib.
GA drawing 01201-400K Note 13 The FHPWP calls out potentiometer specifies axial play requirements setting requirements which sets in potentiometer shaft and is not the gear mesh and shaft axial specified in the FHPWP.
float which governs the axial play.
GA drawing 01201-400K Note 18 The FHPWP does not delineate the specifies the removal of set requirement to remove the set screws after installation of roll screw in every place where a pin. This is not explicitly roll pin was installed. Since it called out in the FHPWP.
was mentioned in some sections, the set screws were removed as a standard work practice after pin installation. The additional sections the FHPWP will be revised specify set screw removal GA drawing D1201-400K Note 24 The FHPWP installation process for specifies the full height of the nut onto the shaft ensures threads to be engaged while compliance with Note 24. The the FHPWP does not call out dimensional stack up of the this specification.
Bellevile washers, stop plate and washer, allows the nut to fully engage on the threaded end of the shaft.
Attachment A l
August 16, 1985 Page 4 of 5 i
DESIGN REQUIREMENTS NOT FULLY IMPLEMENTED INTO THE FHPWP
RESPONSE
GA drawing D1201-739D and 742D During rework, additional lubing Note 5 specifies the lubrication was not done. These surfaces are of housing and guide seating not considered critical and the surfaces with Molykote 321 or lube requirements are not CERAC Spill. This is not essential.
specified to be done in the FHPWP.
GA drawing D1201-813E Note 23 These bolts only exist on the requires lockwiring of bolts and instrumented CRDOA's and are not a is not required in the FHPWP.
part of the refurbishment program.
GA drawing 01201-940M Note 13 The bolts were lubed as a batch specifies the lubing of threads using the required lube or equiv-to be done with CERAC Spill with alent. The lubing of the bolts no mention made in the FHPWP.
fell under the generic statement to lube all threaded fasteners.
The FHPWP will be revised to specifically call out the lubing of these bolts and D1201-940M Note 13 has been revised per CN-1986 to allow the use of an equivalent lubricant.
Drawing 01201-1080A Note 4 Reference is made in the FHPWP to references GGA specification drawing D1201-1080 which in turn, 907604 with no direct reference references the GGA specification made in the FHPWP.
907604.
Drawing D1201-1085A Note 5 Reference is made in the FHPWP to references GGA specification drawing D1201-1080 which in turn, 907604 with no direct reference references the GGA specification made in the FHPWP.
- 907604, 1
GA 0 & M Manual 9806 requires
" Loctite 242" is an approved thread l
the staking of shim motor set locking mechanism per CN-1933A.
screws while the FHPWP requires The 0 & M Manual will be updated the use of " Loctite 242".
to reflect alternate use of I
" Loctite 242".
GA 0 & M Manual 9806 requires 25 to 30 in. 1bs. is an acceptable bolts to be tightened 10 to torque value for these bolts. The 15 in. 1bs. while the FHPWP 0 & M Manual will be updated l
requires 25 to 30 in. Ibs, to reflect this change.
t
Attachment A August 16, 1985 Page 5 of 5 DESIGN REQUIREMENTS NOT FULLY IMPLEMENTED INTO THE CRD0A PURCHASE ORDERS
RESPONSE
Drawing SLR-D1200-100 Note 3 CN-1494 was approved 1/29/85 which requires material procured to incorporated Spec. 12-D-14.
Spec. 12-D-1.
The purchase Drawing Note 3 requires in-order N-5811 called out Spec.
corporation of CN-1494.
12-D-14.
Drawing SLR-D1201-105 D is the CN-1933D added Note 5 listing latest revision dated 3/1/85.
acceptable alternate material. The P.O. N-5610 issued 8/28/84 drawing note is less restrictive, called for Revision C.
Some
.therefore, no drawing note deviation parts were received after exists.
3/1/85 to Revision C.
Drawing SLR-D1201-222 F is the Revision F deleted bearing run-in latest revision dated 3/2/85.
conditions, therefore, the later P.O. N-5868 was issued 1/15/85.
revision is less restrictive and Some parts were received to no drawing note deviation exists.
Revision E.
Drawing SLR-D1201-259 C is the CN-1933C allowed an equivalent latest revision dated 3/2/85.
bearing to be used. The later Parts received prior to 3/2/85 revision is less restrictive, were accepted to Revision B.
therefore, no drawing deviation exists.
Drawing SLR-D1201-260 D is the CN-1933C allowed an equivalent latest revision dated 3/2/85.
bearing to be used. The later re-Parts were received to Revision vision is less restrictive, C prior to 3/2/85.
therefore, no drawing note deviation exists.
Drawing SLR-D1201-262 C is the Revision C added CN-1933 drawing latest drawing dated 3/2/85.
note allowing use of alternate P.O. N-5868 Supplement 2 was material, with components issued 1/27/85 called for complying to Revision C.
Revision B. No parts were received as of 6/21/85.
Drawing SLR-D1201-280 F is the Drawing Revision F did not add or latest revision dated 3/18/85, change notes as a result of in-Parts were received after 3/18/85 corporation of CN-1933E.
to Revision E.
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