IR 05000387/1985005
| ML17156A123 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 04/10/1985 |
| From: | Durr J, Gregg H, Raval J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML17156A121 | List: |
| References | |
| 50-387-85-05, 50-387-85-5, NUDOCS 8504180495 | |
| Download: ML17156A123 (10) | |
Text
U.S.
NUCLEAR REGULATORY COMMISSION
REGION I
Report No.
50-387/85-05 Docket No.
50-387 License No.
NPF-14 Category C
Licensee:
Penns lvania Power
& Li ht Com an 2 North Ninth Street Allentown Penns lvania 18101 Facility Name:
Sus uehanna Steam Electric Station Unit
Inspection At:
Berwick Penns lvania Inspection Conducted:
Februar 11-15 1985 Inspectors:g v'
. I. Gregg, Lead Reactor Engineer J.
H. Raval, Reactor Engineer
+ /j~ //SF>
Date
+/io/ ~J'8'W Date Approved by:
.
P. Durr, Chief Engineering Branch Division of Reactor Safety D te Ins ection Summar:
Ins ection on Februar 11-15 1985 Ins ection Re ort No. 50-387/85-05
.
related to shock suppressors (Snubbers).
The inspection included review of the licensee'
snubber Technical Specifications, visual and functional surveillance maintenance and test procedures, in-service testing, and gA/gC interface.
Additionally, the inspection involved a plant walkdown of preselected snubbers, performing independent measurement and evaluation, and witnessing the Wyle mobile laboratory testing of a
The inspection involved 80 hours9.259259e-4 days <br />0.0222 hours <br />1.322751e-4 weeks <br />3.044e-5 months <br /> on site by two region based inspectors.
Results:
No violations were identified.
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DETAILS PERSONS CONTACTED PENNSYLVANIA POWER AND LIGHT COMPANY PP&L E. Carrol, ISI Supervisor
- F. Chandler, Maintenance Engineer T. Clymer, gA Coordinator
- T. Crimmins, Nuclear Plant Engineer E. Eustice, Supervising gC Specialist S.
Denson, Assistant Manager, Nuclear gA E. Gorski, gC Supervisor Maintenance
- H. Keiser, Plant Superintendent
"R. Prego, gA Supervisor-Operations
- D. Roth, Maintenance Engineering Supervisor M. Seechock, Master Mechanic Structural WYLE LABORATORIES W. Bragg, Site Manager L. Hares, Technician J.
Murphy, Wyle Model 100 Operator U.S.
NUCLEAR REGULATORY COMMISSION
"R. Jacobs, Senior Resident Inspector
"Denotes those present at the exit meeting.
SNUBBER TS SURVEILLANCE REVIEW The inspector reviewed the licensee's snubber technical specification (TS)
3/4 7-9, surveillance requirements to determine visual inspection frequency, functional test requirements and acceptance criteria.
The inspector noted that the plant has approximately 2000 safety related snubbers and all are the Pacific Scientific mechanical type.
The inspector verified that the visual inspection currently in process is being performed within the TS required
month period based on zero inoperable snubbers of the prior inspection.
The inspector also verified that a representative sample consisting of 10S snubbers was selected for functional testing as required in the TS.
Discussions were held with cognizant maintenance personnel who are supervising and performing the inspections, to verify that specific
- procedures were in place to enable the work to be performed.
Addition-ally, the inspector determined that the functional testing is to be
r
performed by Wyle Laboratories (in their on-site mobile laboratory)
to assure that qualified and experienced personnel (with SSES personnel in attendance)
with calibrated test equipment and testing machine would be utilized to perform the testing.
No violations were identified.
3.
SNUBBER INSPECTION AND TESTING PROCEDURES The inspector reviewed the following licensee's snubber procedures which provide the detailed instructions, acceptance criteria, documentation requirements and maintenance records review requirements.
SM-100-001, Rev.
1, Mechanical Snubber Visual Inspection SM-100-004, Rev. 0, Mechanical Snubber Functional Testing SM-100-003, Rev.
0, 18 Month Snubber Operating History Review M-1090, Rev. 0, Inservice Testing of Safety Related Mechanical Snubbers and Compensating Struts The inspector verified that the licensee's snubber inspection and testing procedures are compatible with the TS.requirements and are the tools by which the TS requirements can be met.
Each of the procedures contained comprehensive step by step actions which maintenance personnel can follow, and record keeping instructions which enable permanent records to be maintained.
No violations were identified.
4.
SNUBBER INSERVICE TESTING IST The inspector reviewed the licensee's program plan for determining snubber functional adequacy during the first ten year inspection interval.
Documents reviewed were:
ISI-T-106.0, Rev 1, Inservice Inspection Program Plan First Ten Year Interval ISI-T-116.0, Rev 1, ISI Selection Document for Class 1, 2, 5 3 Component Supports The inspector determined that the functional testing requirements of TS 3/4.7.4 are used as the functional adequacy requirements of the ASME Section XI Code requirements.
The maintenance department performs the TS snubbers functional testing and provides the ISI department records of the results.
No violations were identifie o Cg
5.
HPCI SYSTEM SNUBBERS PLANT WALKDOWN The inspector performed a
'plant walkdown of selected HPCI system snubbers.
Observations were made of the following snubbers:
DBB-114-05, Size
~~ Ser.
No.
13426 DBB-115, Size ' Ser.
No ~
13946 DBB-115-02, Size ' Ser.
No.
14392 DBB-120-1, Size ~~Ser.
No.
21138 For each snubber, the inspector reviewed the cold setting and hot setting nameplate data and verified that each snubber was in the correct cold setting position.
Additionally the inspector verified that the attach-ments were secure and that all required identification was in place.
No violations were identified.
6.
WYLE MOBILE SNUBBER LABORATORY The inspector visited the Wyle mobile snubber laboratory, presently on-site, in which snubber functional testing will be performed during the current refueling outage.
The inspector discussed the Wyle Model 100 test machine with cognizant Wyle personnel, and reviewed the following Wyle test procedure:
MS-003, Rev.
B, Mechanical Snubber Testing using the Wyle Model 100 Test Machine.
The inspector requested a sample snubber to be tested so that observations could be made of the testing and the computer readout of the results.
A test on a
known reject snubber from the training room was performed and was verified to be a reject.
Upon disassembly, there was evidence of a
missing capstan spring tang.
The recorded data from the known reject was compared to the data from an acceptable snubber and the differences were readily apparent.
The inspector also determined that licensee's maintenance and QC personnel would be witnessing the Wyle laboratory testing.
No violations were identified.
7.
MECHANICAL SNUBBERS A/
C INTERFACE The Corporate Manager, Nuclear Quality Assurance (NQA) reports to Vice President, Nuclear Operations.
The Assistant Manager, NQA, (Operations)
is on-site located and reports to the Corporate Manager, NQA.
The on-site Assistant Manger, NQA heads the following sub-groups:
1)
General Quality Control 2)
Quality Assurance Modifications 3)
Qual ity Assurance-Operati ons The General Quality Control group is subdivided into 1) Quality Control Maintenance; 2)
NDE Services, and 3) Quality Control Modifications.
The Quality Control Maintenance group is involved in safety related mechanical snubbers surveillance and inservice testing programs.
The Quality Assurance Operations group is subdivided into; 1) Mechanical/
Nuclear and; 2)
Electrical/I&C disciplines.
The Mechanical/Nuclear discipline is involved in QA survei llances and audits program of the mechanical snubbers.
The surveillance is planned monthly on a
random basis for the specific item(s).
The surveillance of the implementation of audit findings is also conducted.
A check list is prepared (AD-00-195 Form) for the pre-planned surveillance activities.
The Quality Assurance Surveillance Reports (QASRs)
are issued for the performed surveillance activities.
The inspectors reviewed the following QASRs and concluded that there was an effective QA involvement concerning the safety related mechanical snubbers:
1)
QASR No.83-057,
"Mechanical Snubber Visual Inspection" inside containment 2)
QASR No.84-152, Functional Testing of Repaired Mechanical Snubbers 3)
QASR No.83-169, Snubber Inspection Program, IE Bulletin 81-01, Rl 4)
QASR No.83-160, Review of Pre-Fuel Load Snubber Inspection Documents The inspector reviewed the following Quality Control Inspection Records (QCIRs)
on the safety related mechanical snubbers and determined there was effectiveness of the QC role as established by the AD-QA procedures:
1)
QCIR No. 85-0362, Defective Capstan Springs 2)
QCIR No. 84-5251, Defective Capstan Spring (warehouse)
3)
QCIR No. 84-5586, Surveillance of Wyle Lab Bench Testing Witness of Snubbers 4)
QCIR No. 84-5641, Surveillance of Wyle Lab Bench Testing of Snubbers (warehouse)
5)
QCIR Nos. 84-5212/5202 - Witness of Removal of Capston Springs
Nonconforming Reports (NCRs)
are issued for all safety-related mechanical snubbers which do not meet the established requirements of the specifi-cations and procedures and then Work Authorizations (WAs) are issued to cor rect the defects.
The QCIRs and QASRs are i ssued for the involved activities, as appropriate.
No violations were identified.
8.
INDEPENDENT MEASUREMENT EFFORTS The inspector visually, examined the following safety related mechanical snubbers in addition to HPCI System walkdown snubber inspection:
HBB-104-H35 Core spray system, 16" pipe, ASME 'III/class
GBB-105-H31 RHR system, 20" valve, ASME III/class
GBB-105-H7 -
RHR system, 20" pipe,. ASME III/class
DBB-115-H9 -
RHR system, Large pipe, ASME III/class
The inspector compared the field identified data including sizes, cold settings, hot settings, movements, and serial numbers for the mechanical snubbers with the corresponding design drawings and verified their compliance with them.
It was noted that the mechanical snubbers were oversized in reference to the design load requirements, as identified on the design drawings.
The licensee acknowledged the oversizing and stated that the conservatism in design approach and subsequent design evaluation process resulted in the oversizing.
At present, the safety related piping analysis is based on as-built snubbers design and the installed snubber s reflect the conservative design, it is concluded that these mechanical snubbers would perform their intended functions, as installed.
9.
EXIT MEETING The inspector met with the licensee's representatives (identified in paragraph 1),
at the conclusion of the inspection on February 15, 1985, to summarize the findings of this inspection.
The NRC Senior Resident Inspector, R. Jacobs, was also in attendance.
At no time during this inspection was written material provided to the licensee by the inspecto