ML20148B205
| ML20148B205 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 03/11/1988 |
| From: | Gagliardo J, Greg Pick NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | |
| Shared Package | |
| ML20148B023 | List: |
| References | |
| 50-498-88-05, 50-498-88-5, 50-499-88-05, 50-499-88-5, GL-81-21, NUDOCS 8803210383 | |
| Download: ML20148B205 (4) | |
See also: IR 05000498/1988005
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APPENDIX B
U.S. NUCLEAR REGULATORY COMMISSION
REGION IV
NRC Inspection Report: 50-498/88-05
Operating License: NPF-71
50-499/88-05
Construction Permit: -CPPR-129
Dockets:
50-498
50-499
Licensee:
Houston Lighting & Power Company (HL&P)
P.O. Box 1700
Houston, Texas
77001
Facility Name:
South Texas Project Electric Generating Station (STPEGS),
Units 1 and 2
Inspection At:
Bay City, Texas
InspectionCondctep: January 19-22, 1988
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Inspector:
\\
Datel
InG. A.(yick, Reactor Inspector, Operational
P
frams, Division of Reactor Safety
30O
Approved:
V. E. gagliardo, Chief, Operational Programs
Date'
Division of Reactor Safety
Inspection Sumary
Inspection Conducted January 19-22, 1988 (Report 50-498/88-05; 50-499/88-05)
Areas Inspected:
Routine, announced inspection of licensee compliance with
Generic Letter 81-21, "Natural Circulation Cooldown." This involved safety
issue management systems (SIMS) Item No. MPA-B-66.
Results:
In this inspection a weakness was identified in the STPEGS comitment
tracking in that it failed to include and/or recognize that there may be
comitments which remain to be implemented.
Specifically, a deviation from
STP's comitment, Confirmatory Item No.11, to use reactor vessel head vents
during natural circulation cooldown was identified.
Additionally, an unresolved item regarding how HL&P plans on altering its
emergency operating procedure writers guide to include comitments was
identified.
8803210383 880315
ADOCK 05000498
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DETAILS
1.
Persons Contacted
- G. E. Vaughn, Vice President, Nuclear Operations
- W. R. Kinsey, Plant Manager
- M. R. Wisenburg, Plant Superintendent, Unit 1
- J. R. Walker, Operations Support Manager
- L. G. Weldon, Manager, Operations Training Division
- S. M. Head, Supervisor, Operations Licensing
- P. L. Walker, Licensing Engineer
- L. R. Schlazer, Consulting Engineer
R. L. Templeman, Senior Reactor Operator (SRO)
D. Olson, Consultant
- Denotes those attending the exit interview.
2.
Followup of Generic Letter 81-21, "Natural Circulation Cooldown" (25586)
The NRC inspector reviewed information related to Houston Lighting and
Letter (GL) y (HL&P) compliance with its commitments relative to Generic
Power Compan
81-21, "Natural Circulation Cooldown." The GL required
licensees to develop procedures and provide training on those procedures
to prevent or mitigate reactor vessel voiding (, verify that sufficient
supplies of safety-grade auxiliary feedwater AFW)areavailable,and
demonstrate by analysis and/or test that a controlled natural circulation
cooldown could be conducted. The STPEGS safety evaluation report (SER)
discusses Confirmatory Item No. 11.
The licensee committed to analyzing
the Diablo Canyon natural circulation boron mixing and cooldown testing,
consistent with NRC Branch Technical Position Reactor Systems Branch 5-1
and satisfactorily demonstrate that the results are applicable to STPEGS,
Unit 1.
Correspondence between the NRC and HL&P reviewed regarding this issue is
listed below:
ST-AE-HL-767, "Natural Circulation Cooldown (GL 81-21)," dated May 5,
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1981
ST-HL-AE-1827, "Applicability of Diablo Canyon Natural Circulation
Test - SER Confirmatory Item Number 11," dated January 21, 1987
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ST-HL-AE-19 9, "Long Term Cooling: Additional Information (SER Open
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Item Number 16)," dated February 13, 1987
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ST-HL-AE-1922, "Applicability of Diablo Canyon Natural Circulation
Test - Confirmatory Item Number 11," dated February 23, 1987
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ST-HL-AE-2011, "Natural Circulation (Confirmatory Item 11) Long Term
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Cooling-(SER Open item 16)," dated March 30, 1987
During verification of licensee activities related to the generic letter,
the NRC inspector determined that STPEGS Unit I had an E0P, 1 POP 05-E0-ES02,
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Revision 2, "Natural Circulation Cooldown," to conduct a natural
circulation cooldown without creating a void in the reactor vessel head.
Classroom and simulator training was conducted on this procedure.
The
licensee calculated the amount of safety grade AFA required to be a maximum
of 377,000 gallons to address a 4-hour hot standby, followed by
approximately a 14-hour natural circulation cooldown.
The usable capacity
of the AFW tank is 525,000 gallons.
The NRC inspector reviewed the licensee's procedure for conducting
natural circulation cooldown with saturated corditions in the reactor
coolant system. The licensee committed to cooling the upper head and
enhance mixing by utilizing the reactor vessel upper head vent (UHV)
systen.
Supplement 3 of the STPEGS, Unit 1 SER discusses the HL&P
comitments contained in correspondence dated February 13, 1987
(Si-HL-AE-1909), February 23, 1987 (ST-HL-AE-1922), and March 30, 1987
(ST-HL-AE-2011).
Confirmatory item No. 11 approval was based on the
comitments in the above mentioned correspondence.
The emergency procedure,1P0P05-E0-ES03, Revision 2, "Natural Circulation
Cooldown With Steam Void in Vessel," used to conduct a natural circulation
cooldown with saturated conditions in the reactor coolant system utilized
pressure control without use of the UHV.
This E0P failed to meet the
comitment described above; therefore, this is an apparent deviation of
the licensee's comitnent to utilize the UHV system.
(498/8805-01)
From discussions with HL&P employees, the NRC inspector determined that
it was not clear to them that the comitment was to be included as
part of the emergency prccedures along with guidance contained in the
Westinghouse Owners Grcup Emergency Response Guidelines (WOG ERG).
The
NPC inspector was informed that items on the Nuclear Plant Operations
Department (NP0D) management action tracking system (MATS) were to be
reviewed for applicability.
Licensee commitments were not defined as a
source of suoport documents in the development of E0Ps as specified in
Procedure OPOP01-ZA-0006, Revision 3, "Emergency Procedures Writer's Guide
and Verification," although the WOG ERGS were. The NRC inspector will
follow up, in a subsequent inspection, the actions taken by HL&P to assure
that the E0P writer's guide has sufficient guidance to ensure that all
comitments pertaining to E0Ps are incorporated into their emergency
procedures and actions taken by NP0D to assure that all emergency
procedure commitments had beer, incorporated.
(0 pen Item 498;499/8805-02)
The NRC inspector determined that HL&P has a site tracking system for
commitments and requirements, the licensee comitment tracking system (LCTS).
Since the MATS is internal to NP00, there is no assurance all commitments
in LCTS pertaining to NPOD were included in the MATS.
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After identification of the above deviation (498/8805-01), the licensee
took corrective action to revise Emergency Operating Procedure IP0P05-E0-ES03,
to include the missed commitments.
The licensee also. proposed corrective
actions to determine whether other commitments may not be included in the
LCTS,
HL&P plans to sample the LCTS and determine whether their commitments,
as identified in the sample, were actually implemented.
Secondly, it
plans on verifying that all commitments contained in correspondence from
HL&P to NRC dated June 1986 to present were included on the LCTS and any
commitments, if not included, are to be added.
This issue is related to a
concern expressed in the cover letter of NRC Inspection Report 50-498;499/87-77
on the adequacy of the commitment tracking system to routinely provide
management with an accurate status of connitments made by HL&P.
This
issue will remain open (0 pen Item 498;499/8805-03) and will be reviewed
following the licensee's response to NRC Inspection Report 50-498;499/87-77.
The NRC inspector confirmed that a startup test procedure,1P0P04-ZX-0010,
Revision 1, "Natural Circulation Verification," was developed and that it
verified establishment of natural circulation as committed to in FSAR
Chapter 14.2.12.3, "Test Description 13."
The NRC inspector confirmed through discussions with the licensee that
it had instrumentation at the emergency shutdown panel to assure natural
circulation cooldown in the event the control room became uninhabitable.
The instrumentation utilized is the same as that in the control room, the
Qualified Dispicy Processing System and Emergency Response Facility
Data Acquisition Display System computer display.
No other violations or deviations were identified.
3.
Exit Interview
The scope of the inspection and findings were discussed with those people
identified in paragraph 1.
The licensee did not identify as proprietary
any of the materials provided to or reviewed by the NRC inspector during
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the inspection.
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