ML20097F830
| ML20097F830 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 06/08/1992 |
| From: | Tuckman M DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9206160073 | |
| Download: ML20097F830 (4) | |
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DUKEPOWER June 8,1992 U. S. Nuclear Regulatory Commission i
NITN: Document Control Desk Washington. D.C. 20555 i
Subject:
Catawba Nuclear Station Docket Nos. 50-413 and 50414 Supplement to TS Amendment Request Technical Specification (TS) 3.6.5.5 (PZR Hatch) i On April 13, 1992 Catawba Nuclear Station submitted a proposed revision to TS 3.6.5.5 l
which would allow the pressurizer enclosure hatch to be open for a period of time up to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. Per conversation with your staff on June 3,1992 additionalinfonnation regarding the scope of work and speelfic work activities is being provided.
The intent of this requested amendment is to allow planned work activities to occur inside j
the pressurizer enclosure, without the need for a waiver of compliance from TS 3.6.5.5.
The scope of work activities inside the pressurizer enclosure during Modes 1-4 will not be increased.
Planned entries into the pressurizer enclosure laclude:
i l.
Upon entering Mode 3 at the beginning of every refueling outage an inspection of the packing leakoff lines on the Reactor Coolant PORV's and the PORV Block Valves is' perfonned. While in the cavity, a ge.eral visual inspection for any type of leak or other problem is perfonned. This inspection must be performed in Mode 3 because it may not be possible to detect leakage as the Unit is cooled down and depressurized. -
This practice began because several start ups wen: delayed due to this type of leakage.
2.
An inspection similar to the one describc<l above is perfonned during Mode 3 following every refueling outage. The PORV's and PORV Block Valves are inspected for packing leakage. Tids is done to ensure the valves are in good condition for the cycle. Also, since the PORV Block. Valves have a pressure seal used for the body to bonnet gasket (which can be affected by tempemture changes), it is a good practice to perfonn a visual inspection of the valves and area.
3.
If any valve work (seat, bonnet, packing, or removal) was performed during the.
n: fueling outage on the-Reactor Coolant PORV's, Block Valves, or Safeties, a functional test for external leakage must be. performed at full tempemture and lh 9206160073 920608
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pressure. During every trfueling outage, it is Catawba's practice to remove at least one Pressurizer Safety to meet the Oserpressurc Protecc.on TS while in low Pressure hiode. This means that the associated inlet and outlet flanges must have a functional inspection perfonned while in hiode 3.
This inspection is perfonned during the inspection described in 2 almve.
E Operations surveillance, "Inside Containment Boric Acid Check" is perfonned upon entering blode 3 at the start of a refueling outage, or after a trip following a long nm.
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Operationc inspects all areas of Containment, including the upper pressurizer cavity, for signs of boric acid conusion from leaks. When perfonned at the start of a refueling ouiage, this sun >cillance is scheduled with inspection 2 above.
Chere are also several reasons why unplanned entries into the prr curizer enclosue would de. These include:
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- uspected instmment tubing leak affecting Pressurizer level indication.
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Confinn Pressurizer Safety salve (s) leakage.
Confirm Pressurizer PORY seat leakage.
4.
Investigate Pressurizer Saf:ty Valve Relief line high temperature.
The Unit 2 PORV Block Valves are schedule to be tested and radiographed on June 23, 1991 The grace period for this surveillance ends on July 16,1992, therefore approval of this TS is needed prior to this date to avoid the need for a waiver of compliance.
If there are any questions, please contact h1ary IIazeltine at 803-831-3080.
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'/ery truly yours.
Ub lwCN\\
hi. S. Tucknaan
U. S. Nuclear Regulatory Commission June 8,1992 Page 3 xc: hir. S. D. Ebneter Regional Administrator U. S. Nuclear Regulatory Commission Region 11 101 h1arietta Street, NW, Sune 2900 Atlanta, Georgia 30323 hir. Heyward Shealy, Chief Bureau of Radiological Health South Camlina Depanment of Health &
Environmental Control 2600 Bul. Street Columb'a, South Carolina 29201 Ameri;an Nuclear Insurers clo Dettie Shennan, ANI Library The Exchange, Suite 245
j 270 Farmington Avenue Farmington, CT 06032 hi & hi Nuclear Consultants 1221 Avenue of the Americas New York, New York 10020 INPO Records Center Suite 1500 1100 Circle 75 Parkway Atlanta, Georgia 30339 hir. W. T. Ortlers NRC Resident Inspector Catawba N'iclear Station hir. R. E. Afartin Office of Nuclear Reactor Regulation U. S. Nuc!rar Regulatory Commission One White Flint North Mail Stop 14H25 Washington, D.C. 20555
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U. S; Nuclear Regulatory Commission i
~ June 6,1992 Page 4 i
4 bxc: R. C. Futrell
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R. L. Gill, Jr.
S. S. Kilbom - W i
M. H. Hazeltine G. B. Swindlehurst l
R. M. Giover l
S. R. Frye i
C. E. Muse j
.A. S. Bhatnager D. R. Rogers W. H. Miller NCMPA-1 NCEMC PMPA SREC Group File: CN-801.01
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