ML19210C908
| ML19210C908 | |
| Person / Time | |
|---|---|
| Site: | FitzPatrick  |
| Issue date: | 10/23/1979 |
| From: | Lainas G Office of Nuclear Reactor Regulation |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7911200293 | |
| Download: ML19210C908 (4) | |
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OCT 2 31979 MEMORANDUM FOR:
T. Ippolito, Chief, Operating Reactors Branch #3, D0R FROM:
G. Lainas, Chief, Plant Systems Branch, D0R
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION - CONTAINMENT PURGE SYSTEM JAMES A. FITZPATRICK NUCLEAR POWER PLANT (TAC 10179)
REFERENCES:
1.
Letter to T. Ippolito from P. Early, " Containment Purging Curing Normal Plant Operation," dated January 9, 1979.
2.
Letter to T. Ippolito from J. Schmieder, " Containment Purging During Normal Plant Operation," dated March 2, 1979.
3.
Letter to T. Ippolito from P. Early, " Justification for Continued Containment Purging During Normal Plant Operation," dated Auaust 15, 1979.
Plane Name: James A. FitzPatrick Nuclear Power Plant Docket No.:
50-333 Project Marager:
P. Polk Review Status: Awaiting Infomation With regard to the containment purge and vent system at the FitzPatrick Nuclear Power Plant, the licensee has elected to justify unlimited purging (Reference 1). The Plant Systems Branch, after having reviewed the documents (References 1-3) filed by the licensee, has orepared the enclosed request for additional infomation.
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. Lainas, Chief Plant Systems Branch Division of Operating Reactors cc: See page 2 1361 343 v on 200 9-7 3 p
. OCT 2 31979
Enclosure:
As stated Contacts:
J. Kerrigan, X-28129 D. Shum, X-27058 R. Scholl, X-27162 cc w/ enclosure:
D. Eisenhut
- 8. Grimes W. Gammill L. Nichols G. 1.ainas P Polk E. Adensam G. Knighton E. Reeves D. Tondi D. Shum J. Kerrigan J.T. Beard F. Witt V. Noonan R. Scholl J. Zudans 1361 J44
ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION FOR THE CONTAINMENT PURGE AND VENT SYSTEM FOR JAMES A. FITZPATRICK NUCLEAR POWER PLANT DOCKET NO. 50-333 1.
With regard to the drywell vent and purge penetration cover grating, discuss the design basis of the grating.
In particular:
a.
Discuss the design basis for the sizing of the grating mesh pattern; b.
Discuss the ability of the grating to withstand dynamic LOCA forces; c.
Dis uss the prtvisions taken to assure that the metal grating has been properly qualified (e.g., for seismic events); and d.
Describe what routine procedures you use to assure that partial blockage of the grating by debris during nomal ope: ration does not affect the ability of the grating to remain in place and perfom its function when subjected to LOCA forces.
2.
The copies of P & ID's attached to your submittal of August 15, 1979 were illegible.
Provide legih'e drawings.
Provide a schematic drawing of the purge system.
Include the isolation valves in this schematic.
3.
For the containment purge isolation valves, specify the differential pressure across the valve for which the maximum leak rate occurs.
Provide test results (e.g., from vendor tests of leakace rate
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versus valve differential pressure) which support your conclusion.
4.
Provide operational justification for utilizing 2 supply and 2 exhaust purge lines for the drywell.
Discuss the procedures governing the use of the purge system (e.g., sequence of valve openings,etc.).
5.
Describe at what point in the valve closure logic the override signal is introduced.
Provide sketches and drawings, as necessary.
6.
Is an override over a single actuation signal or over more than one actuating signal?
7.
Describe the manual control switches.
Are they spring return to a neutral position? What provision is there to prevent accidental actuation?
1361 J45
,, 8.
Are separate control switches provided for each valve? If not, how many valves are controlled per switch and how are they split up?
9.
Is the core spray logic reset automatically or manually?
- 10. The containment ventilation isolation tystem signals should be derived from safety grade equipment. Discuss the qualifications of the reactor building ventilation exhaust radiation monitoring channels.
1361 J46