ML20028D398
| ML20028D398 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 01/11/1983 |
| From: | Stolz J Office of Nuclear Reactor Regulation |
| To: | Crouse R TOLEDO EDISON CO. |
| Shared Package | |
| ML20027A776 | List: |
| References | |
| REF-GTECI-B-24, REF-GTECI-EL, REF-GTECI-ES, TASK-B-24, TASK-OR NUDOCS 8301190069 | |
| Download: ML20028D398 (3) | |
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bI flRC ODR H0rnstein L PDR EReeves ORB #4 Rdg G, //oww DEisenhut Docket flo.50-34G OELD AE00 LHarmon-2 ACRS-10 f.!r. Richard P. Crouse TBarnhart-4 Vice President, fluclear LSchneider Toledo Edison Company OGC Edison Plaza OPA 300 fladison Avenue DBrinkman Toledo, Ohio 43652 RDiggs ADe Agazio
Dear !!r. Crouse:
RIngram Gray File SU3 JECT:
C0tiTAllflEliT PURGE A!!D VEllTIliG; GEllERIC ISSUE B-24 Our letter of Deceaber 3. -1982 sur.vnarized the status of our continuing review of the safety concerns related to purging and venting of containment while the reactor coolant system is in modes 1 through 4 (Generic item B-24). The staff has now completed two additional components of this complex review. Safety Evaluation Reports for these items are included as enclosures to this letter. is the Safety Evaluation Report relating to override of 1
the containment purge isolation signal. We find that with certain exceptions, the electrical, instrumentation, and control design aspects of the override of containment purge valve isolation and other engineered safety features signals are acceptable. For the system to be totally acceptable the following design changes are required unless the containraent purge and vent values are sealed closed when in modes 1 through 4 1.
The Safety Features Actuation Systea (SFAS) should be modified so that the overriding of one type of safety actuation signal does not cause the blocking of any other type of safety actuation signal as required by Criterion 1.
2.
The block (override) push-buttons on the SFAS initiation panel should be provided with special physical features to facilitate adainistractive controls as required by Criterion 2.
3.
System level annunciation of the override status should be provided.
You are requested to review the Safety Evaluation Report (Enclosure 1) and our contractor's Technical Evaluation Report (Enclosure 2) for guidance should you decide to continue your efforts to qualify the 43 inch Pratt valves to penait partial opening during modes 1 through 4
Please also note that these requirenents would also apply to a 8301190069 830111 PDR ADOCK 05000346 P
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!!r. Richard P. Crouse I mini-purge systera if one is installed at some time in the future. is a Generic Evaluation of the radiological consequences of accidents while purging and venting at power. This evaluation concludes that the dose contribution, resulting from venting of the containment atmosphere after an accident before the purge oc vent valves can be closed, is small and that the total consequences of such accidents would be less than the dose guidelines of 10 CFR 100.
provided the assumptions listed in Enclosure 3 are met.
Sincerely,
{0R1GUuh SIcxzo 3y rom. snm.
John F. Stolz, Chief Operating Rdactors Branch f4 Division of Licensing
Enclosures:
As Stated cc w/ enclosures:
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6 Toledo Edison Company ccw/ enclosure (s):
Mr. Donald H. Hauser, Esq.
U.S. Nuclear Regulatory Comission The Cleveland Electric Resident Inspector's Office Illuminating Company 5503 N. State Route 2 P. O. Box 5000 Oak Harbor, Ohio 43449 Cleveland, Ohio 44101 Gerald Charnoff, Esq.
Shaw, Pittman, Potts and Trowbridge 1800'M Street, N.W.
Washington, D. C.
20036 Paul M. Smart, Esq.
Fuller & Henry 300 Itadison Avenue P. O. Box 2088 Reaional Radiation Representative Toledo, Ohio 43603 EP Region V 230 South Dearborn Street Mr. Robert B. Borsum Chicago, Illinois 60604 Babcock & Wilcox Nuclear Power Generation Division 7910 Woodmont Avenue, Suite 220 Bethesda, !!aryland 20814 Ohio Department of Health e
ATTN: Radiological Health Program Director P. O. Box 118 President, Board of County Columbu:, Ohio 43216 Commissioners of Ottawa County Port Clinton, Ohio 43452 Attorney General Department of Attorney General 30 East Broad Street Columbus, Ohio 43215 Harold Kahn, Staff Scientist Power Siting Commission 361 East Broad Street Columbus, Ohio 43216 Mr. James G. Keppler, Regional Administrator U. S. Nuclear Regulatory Commission, Region III e
799 Roosevelt Road Glen Ellyn, Illinois 60137 Mr. Larry D. Young Manager, Nuclear Licensing Toledo Edison Company Edison Plaza 300 Madison Avenue Toledo, Ohio 43652
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