ML20116E531
| ML20116E531 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 03/21/1990 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20116D885 | List:
|
| References | |
| FOIA-96-237 NUDOCS 9608060031 | |
| Download: ML20116E531 (3) | |
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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION 4
PLANT SYSTEMS BRANCH l
TECHNICAL SPECIFICATION CHANGE REQUEST FOR CALVERT CLTFFS FOR FIVE HVAC SYSTEMS CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT I AND 2 DOCKET NOS. 50-317, 5-0-318 l
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1.0 INTRODUCTION
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By letter dated August 30, 1989, supplemented by letter dated i
January 12, 1990, the Baltimore Gas and Electric Company requested amendments to the technical specifications for Calvert Cliffs Unit Nos. I and 2.
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proposal would change the technical specifications for the following systems:
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(1) containment iodine removal l
(2) penetration room exhaust air filtration (3) control room emergency ventilation i
j (4) ECCS pump room exhaust air filtration, and i
(5) spent fuel pool ventilation i
The proposed changes concern obtaining and analyzing charcoal adsorbeht samples, in-place testing of the HEPA filters and charcoal adsorbers, and verification of control room isolation on a high radiation signal.
2.0 EVALUATION j
Four changes were proposed as described and evaluated below.
The proposal would change, from 130*C _to 30*C, the temperature at which the laboratory analysis of charcoal adsorbent samples are conducted. This applies to each of the systems listed above, except for the containment iodine removal system. The licensee stated that the 30*C test temperature is more indicative of the accident conditions to which these adsorbers would be subjected and, therefore, will yield more-realistic test results. The change also will cause the test results to be more conservative than the present test results. As described in Information Notice 86-76, testing of carbon adsorbent samples at 30*C yields lower iodine removal efficiencies than testing at 130*C, thereby increasing the likelihood of the used charcoal in the adsorber (tested charcoal) having to be replaced by unused charcoal because of the test results.
9608060031 960731 PDR FOIA DINICOL96-237 PDR
. The proposal would change, from two to one, the number of required samples to ba obtained for laboratory analysis of charcoal adsorbent. This change applies to all five systems. The licensee stated that the intent was to remove two samples in case one became unstable, but to test only one. Ta king cne sample will still give a representative sample.
Current regulatory guidance and industry practice do not indicate a need for more than one sample.
The proposal would change, for all five systems, the wording of the requirement for in-place testing of the HEPA filters and charcoal adsorbers so that testing is in accordance with Regulatory Guide 1.52, Revision 2 March 1978, Regulatory Positions C.S.a. C.S.c, and C.S.d (as appropriate) rather than, as currently, ANSI N510-1975. Regulatory Positions C.S.a. C.S.c.
and C.S.d refer to ANSI N510-1975. The licensee stated that this change is administrative.
The proposal would clarify the present requirement to verify that the control room emergency ventilation system isolation valves close on a high radiation test signal. The clarification would change the wording to require that both of the isolation valves in each inlet duct and conNOR GXhaust duct. and the isolation valve in the toilet area exhaust duct, close.
The staff has reviewed the licensee's evaluation and concurs with the licensee's conclusions. The staff also finds that the proposed changes are consistent with the intent of 10 CFR Part 50 Appendix A General Design Criteria 19, 41, 42, and 61; NUREG-0800. Standard Review Plan Sections 6.4 and 6.5.1; and the Standard Technical Specifications.
3.0 CONCLUSION
Based on the above evaluation, the staff finds the proposed changes to the technical specifications acceptable.
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w SPLB SALP INPUT Plant Name: Calvert Cliffs Nuclear Power Plant, Unit I and Unit 2 SER
Subject:
TS Change Request for Five HVAC Systems TAC Nos.: 75249, 75250 Sunnary of Review / Inspection Activities A safety evaluation was performed of the licensee's proposal to amend the TS for ESF filter system testing.
Narrative Discussion of Licensee Performance - Functional Area - Safety Analysis The licensee's proposal was, in part, responsive to previous suggestions by the NRC staff. The submittal was complete, technically accurate, and well supported.
No contact was made with the licensee.
l Author: Charles R. Nichols Date:
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