IR 05000313/1993016
| ML20035G463 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 04/22/1993 |
| From: | Powers D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | |
| Shared Package | |
| ML20035G456 | List: |
| References | |
| 50-313-93-16, 50-368-93-16, NUDOCS 9304270275 | |
| Download: ML20035G463 (10) | |
Text
-
'
.
.
,
APPENDIX U.S. NUCLEAR REGULATORY COMMISSION
REGION IV
NRC Inspection Report:
50-313/93-16 50-368/93-16 Operating Licenses: DRP-51 NPF-6 t
Licensee Name:
Entergy Operations, Inc.
Route 3, Box 137G Russellville, Arkansas 72801 Facility Name: Arkansas Nuclear One, Units 1 and 2 Inspection At: Arkansas Nuclear One, Russellville, Arkansas Inspection Conducted: March 22-26, 1993 Inspector:
R. C. Stewart, Reactor Inspector, Maintenance Section Division of Reactor Safety
>
Approved:
db-
- <M&
Y22l93 Dr. Dale A. Powers, Chief, Maintenance Section Date Division of Reactor Safety i
Inspection Summary Areas Inspected (Units 1 and 2):
Routine, announced inspection of the programs and procedures for the examination and testing of piping supports and'
restraint systems and followup of a licensee event report.
Results:
!
The isometric drawing update program is nearing completion.
Drawing
'
packages were developed with computer assistance and provided distinct design /as-built features. This program was considered a strength (Section 2.1).
The administrative controls and implementation procedures for the
technical specification snubber and inservice testing programs were well defined. These programs had been upgraded and were considered strengths (Section 2.3).
Plant housekeeping and cleanliness controls were being well maintained
(Section 2.4).
~
9304270275 930423 PDR ADOCK 05000313 O
. -
-
- - -
-
-
.
.
-
-l
.
.
.
i-2-
'
,
Sumary of Iospection Findinas No inspection findings were opened.
- Licensee Event Report 368/90-018 was closed (Section 3).
l
Attachments:
Attachment 1 - Persons Contacted and Exit Meeting
Attachment 2 - Documents Reviewed
,
F
-
- -. - - - -
.
.
.
-3-DETAILS 1 PLANT STATUS During this inspection period, Units 1 and 2 remained at full power.
2 TESTING PIPING SUPPORT AND RESTRAINT SYSTEMS (70370)
The purpose of this inspection was to determine if the licensee's established programs and procedures pertaining to the examination and testing of piping supports and restraint systems were being maintained and implemented in accordance with regulatory requirements, Technical Specifications (TS) and licensee commitments.
2.1 Backaround and Isometric Update Proiect 2.1.1 Discussion Members of the licensee's responsible technical staff provided the inspector with the background history and current status of the piping component support isometric drawing update project. The Isometric Update Project was initiated in late 1988 as a result of the response to NRC Bulletins 79-02, " Anchor Bolts and Baseplates," and 79-14, " Piping Analysis Consistency with Plant Configuration."
Subsequent NRC concerns regarding significant discrepancies between as-built Seismic Class I piping / supports and the governing designs were identified in an NRC followup inspection conducted July 10-21,- 1989 (NRC Inspection Report 50-313/89-200, dated October 6, 1989). The inspection results prompted the licensee's management to reorganize and consolidate the isometric update program and establish an aggressive 5-year scheduled effort for both Units 1 and 2.
The effort is scheduled to be completed by December 31, 1995.
(Details regarding the commitment is contained in a letter to NRC dated November 22, 1989.)
The licensee representatives stated that the original drawing update effort (for both units) involved approximately 90,000 linear feet of piping and over 11,000 piping supports. As of this inspection, the drawings that remain to be validated involve small bore piping of 2" diameter and under. This final activity is scheduled to be completed during the next refueling outages for each unit.
The licensee presented an extensive isometric drawing update program that demonstrated a three-phase effort that has resulted in upgraded design-basis analysis, indexing, field verification, and reconciliation packages. The drawingr were developed utilizing computer-assist techniques that provided i
.
- -
.
-
.
-
-
-
-
-
.
-
.
_.
..
.
-.
.
.
-
.
.
.
'
.
'
_4
<
l verified field location of the components, as-built design details, reference to supporting calculation analysis, and ASME code class identification, that included inservice inspection (ISI) identification when applicable.
(The
inspector utilized the detailed pipe support isometric drawings during the
.
system walkdowns conducted during this inspection.)
l 2.1.2 Conclusions The broad scope evaluations and analyses performed in producing quality piping l
support isometric drawing packages were considered a strength in this
functional area.
>
2.2 Review of Previous 1v Identified Discrepancies The licensee provided the inspector with the results of their actions relative to pipe support discrepancies observed by an inspector during a March 4-8, l
1991, Unit 2 inspection (i.e., NRC Inspection-Report 50-313; 368/91-08).
r The ASME Section XI pipe supports with discrepancies were as follows:
'
ISI No.
Mark No.
Iygg Drawina 63-040 2 EBB-8-H1 Spring Base Support H-12-801 (R3)71-015 2HBC-32-H8 Spring Base Support 2HBC-32-H8 (R6)71-017 2HBC-32-H7 Box Frame H23-3207 (R3)73-070 2HBC-51-H11 Complex Spring Hanger H23-5111-(R8)
2.2.1 Discussion The licensee provided detail drawings of the supports, ISI'Nos.63-040 and
,71-015, demonstrating that there were actually no discrepancies in the welding
'
detail or the method of pipe support identification.
Piping support, ISI 71-017 (channel iron box frame), was observed in 1991 to have severe
corrosion (no evidence of structural damage). This support is located in the
service water pump house, piping bay "A," and normally inaccessible. The support, and a similar component in bay "B," were scheduled to be cleaned and
refurbished, during the 1994 Unit 2 refueling outage.
.
Spring hanger, ISI No.73-070 (and others, not specifically identified), was observed to have excessive amounts of accumulated deb is in the lower spring can. During the above discussions with the cognizant licensee
-
,
representatives, the inspector was provided with copies of the Units I and 2, i
Spring Can Pipe Hanger Inspection Procedures 2306.022, " Unit 2 Spring Can Pipe
,
Hanger Surveillance," and 1036.013, " Unit 1 Spring Pipe Hanger Preventive Maintenance." The procedure revisions to. Sections 8.1.1 incorporated the
.'
requirement to specifically examine the inside of each spring can during the system walkdowns.
i l
!
.
..
.
.
.
,
-5-2.2.2 Conclusions Although the above issues were identified in NRC Inspection Report 50-313; 368/91-08 as minor discrepancies and not as inspection followup items, nor unresolved issues, the licensee's responses appeared to be appropriate and
'
timely.
2.3 ISI and Mechanical Snubber Proaram Overviews During the inspection, the inspector met with each of the licensee's lead engineers assigned to the respective ISI and mechanical snubber programs in i
'
order to obtain an overview of these programs.
2.3.1 Discussion In conducting an overview of the current Unit 2 ISI program (second 10-year interval, March 26, 1990 through March 25,2000) and the associated procedures (see Attachment 2) with the licensee's lead ISI engineer, the inspector observed that the program plan was computer-based, well developed, and included a comprehensive listing all ISI safety-related pipe and component supports with a corresponding schedule of surveillance frequencies. This listing included the assigned specific inspection requirements to be accomplished during one or more of the 10-year interval periods (3, 4, and 3 years).
In addition, based on the inspector's sample, the programs appeared to be effectively updated to the 1986 Edition of the Section XI ASME Code.
In describing the administrative controls utilized in maintaining a current document, the licensee representative stated that in addition to the in-house ISI program approval and change controls, members of the ISI technical staff attend all related ASME code meetings and seminars to stay abreast with current industry state-of-the-art and/or changes.
In addition, Entergy Operations, Inc. has established a Corporate ISI Peer Group, charted to develop an ISI standard program to be utilized by all Entergy nuclear facilities. The initial meeting was scheduled for early April.
During a subsequent meeting with the licensee's responsible lead engineer for the mechanical snubber program (both units), the inspector was provided copies of the program implementing procedures (see Attachment 2). The principle implementing Procedure 1306.023, " Snubber Functional Testing," Revision 8, contained the requirements prescribed by the TS for Units 1 and 2; ASME Code Section XI; and supplier instruction manuals. The procedure was also derived from the computerized "TRISIC Data Base Manual" (developed by Wyle Laboratories).
The data base manual was the lead engineer's program controlling document, which included snubber identification, location, testing, test results, schedules, maintenance history, and a replacement schedule (when deemed necessary). The manual had been updated after each unit refuelin.
.
.
-
.
-6-2.3.2 Conclusions The licensee has demonstrated a performance-based effort in implementing the ISI and TS mechanical snubber programs in conjunction with the associated reconstituted isometric as-built drawings.
Lead engineers were very knowledgeable in program requirements and aggressive in maintaining current programs. Administrative controls and implementing procedures were well defined. These programs had been upgraded and were considered to be a strength.
2.4 System Walkdowns The inspector made a random selection of 30 Unit 2 safety-related ASME Seismic Class 1 (Piping Classes 2 and 3) pipe supports for a as-built system walkdown verification.
Support components were of varied configurations and installed on portions of the low and high pressure safety injection systems, containment spray, shutdown cooling, and portions of the service water system and main steam system.
(Isometric and P&ID drawings that were utilized by the inspector during the walkdowns are listed in Attachment 2 to this report.)
Because both units were operating at power, the system walkdowns were limited to systems within the Unit 2 auxiliary building and the Units 1 and 2 turbine buildings.
2.4.1 Discussion The inspector's visual inspection of piping supports and mechanical snubbers during the system walkdowns included attributes, such as:
component location,
,
as-build configuration, loose or missing parts, debris or abnormal corrosion products, physical damage, integrity of welds (where visible), freedom of movement, clearances, and spring hanger positions.
In addition, mechanical snubbers were visually examined for cleanliness, evidence of wear, freedom of movement, and settings.
The inspector also observed during the auxiliary building and turbine building walkdowns, that the general housekeeping / cleanliness (including inside spring cans) was exceptionally good (also, the completion of recent painting throughout all areas visited was apparent). The general housekeeping observations also included the barriers and in-situ controls relative to potentially radiologically contaminated areas.
2.4.2 Conclusions i
In conjunction with the good general housekeeping, piping supports, including i
spring hangers and mechanical snubbers, were being W11 maintained. There were no discrepancies identified during the system walkdowns. The sampled reconstituted isometric as-built drawings utilized during the walkdowns were accurate and well detailed, including a unique ISI numbering system that provided an enhancement to the ISI program.
!
'
i
.
.
"
.
.
.
.
-7-3 DNSITE REVIEW 0F LICENSEE EVENT REPORT (92700)
3.1 (Closed) Licensee Event Report 368/90-018:
Failure to Examine Ninety Class 3 Component Supports Durina An Inservice Inspection Period The licensee's review of the Unit 2 first 10-year interval for ISI revealed that approximately 90 ASME Code Class 3 component supports (in the service water system) had not been examined. The examination was required by ASME Code Section XI during the first inspection period (supports were to be examined every 40 months, i.e., three times each 10-year interval).
Subsequent corrective action by the licensee resulted in the missed examinations being accomplished during the second period.
In addition, 100 percent of the Class 3 supports were reexamined during the third period with no significant safety concerns identified. The root cause of this event was attributed to an inadequate implementation of the ISI program by the contractor and the lack of involvement by ANO personnel with the program during the first inspection period.
(The issue of licensee oversight of contractor maintenance activities is a program weakness currently under review in NRC Inspection Report 50-313/93-17; 368/93-17.)
Additional corrective actions initiated during the 1990 time frame included the development of a computer data base program, and upgrading (both units) to the 1986 edition of the ASME Code. Also, ANO engineering personnel were assigned to the ISI program to provide a more direct and positive ANO administrative control over the program. The inspector concluded that the corrective actions initiated by the licensee in 1990 had resulted in a well established performance-based ISI program for both units. This item is closed.
.
- -
-
-
.
. -
.
-
..
.
,
.
-
.
.
.
,
ATTACHMENT 1
.
.
!
1 1 PERSONS CONTACTED 1.1 Enterav Personnel
-
J. Barrett, Supervisor, Quality Control
- S. Boncheff, Licensing Specialist D. Boyd, Licensing Specialist l
J. Buckalew, Assistant Mechanical Superintendent, Unit I
- R. Carter, Technical Assistant, Maintenance, Unit 2 I
- R. Douet, Maintenance Manager, Unit 1 R. Espolt, Technical Assistant to Plant Manager, Unit 2
- J. Fisicaro, Director, Licensing
.
- R. Fougerousse, Inservice Inspection Engineer, Engineering Programs
- R. Gillespie, Manager, Central Support
- J. GoBell, Design Engineer, Central Support
,
- *B. Greeson, Superintendent,' Structural Analysis
'
- M. Ledezma, Supervisor, Maintenance Engineering i
- D. Lomax, Manager, Engineering Programs
- M. McInerney, Central Support Maintenance Engineering i
- J. Ray, Supervisor, Nondestructive Examination E. Rogers, Supervisor, Maintenance Engineering
,
- M. Sellman, General Manager, Plant Operations
!
G. Sullins, Coordinator, Maintenance e
- J. Taylor-Brown, Coordinator, Quality l
1.2 NRC Personnel
.
T.-Gaines, Senior Resident Inspector (Acting)
K. Weaver, NRC Co-op
~
J
- Denotes personnel that attend the exit meeting conducted on March 26, 1993.
2 EXIT MEETING i
An exit meeting was conducted with licensee management personnel on March 26, j
1993. During this meeting, the inspector reviewed the scope and findings of the report. The licensee did not identify as proprietary any of the materials J
provided to, or reviewed by, the inspector.
,
!
l
'
.
,
- - - - - - - - -
'
.
,
.
,
ATTACHMENT 2 DOCUMENTS REVIEWED Inservice Inspection Program (Unit 2) Plan (March 26, 1990 - March 25, 2000, Revision 0)
Inservice Inspection Technical Manual for ANO-1, Unit 2, Revision 6 TRISIC Data Base Manual for Snubbers PROCEDURES
2306.022
" Unit 2 Spring Can Pipe Hanger Surveillance," Revision 1 1036.013
" Unit 1 Spring Pipe Hanger Preventive Maintenance," Revision 6 1306.003
" Visual Inspections, VT-3 Limited Operability Testing of Snubbers,' Revision 17 1306.023
" Snubber Functional Testing," Revision 8 1025.042
"ASME Section XI Visual Examinations VT-2 and VT-3/4,"
Revision 0 1092.025
" Control of Inservice Inspection Program Documents," Revision 2 DRAWINGS 2GC5-5.2
" Isometric-Containment Auxiliary Building Safety Injection,"
,
!
Revision 5 M-2210
" Piping and Instrument Diagram, Service Water," Revision 1 2GCB-5-1 Large Pipe Isometric RC Loop 2CCA-25 to LPSI Pump 2P-60A and 2P-60B Inlet, Sheets 1, 2, and 3,"
Revision 16 2GCB-5-3
"Large Pipe Isometric Safety Injection From RC Loop to LPSI Pump 2P-60A and 2P-60B Inlet," Revision 6 M-2232
"P&ID Safety Injection System," Revision 65 M-2236
"P&ID Containment Spray," Revision 68 2-HBC-3-1
"Large Pipe Isometric Service Water Header," Revision 12 PIPING SUPPORTS - DETAIL DRAWINGS l
!
DRAWING NO.
REVISION SHEETS 2HBC-34-H12
1-3
H-23-34-H11
H-23-34-H10
1-3 i
l
6
.
-2-
<
DRAWING NO.
REVISION SHEETS H-23-34-H9
1-5
'
l-3 2HBC-34-H7
1-3 H12-801
1-4
~
1-3 2HBC-32-H6
1-4 2HBC-33-H21
1-3 2HBC-33-H2O
1-7 2HBC-33-H11
1-5 2HBC-33-H10
H-23-3309
1-2 2HBC-33-H8
1-5
,
s l