ML19261B172
| ML19261B172 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 02/06/1979 |
| From: | Utley E CAROLINA POWER & LIGHT CO. |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| References | |
| GD-79-323, NUDOCS 7902140124 | |
| Download: ML19261B172 (4) | |
Text
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CP&L Ca olina Power & Light Company February 6, 1979 FILE: NG 3514(B)
SERIAL: GD-79-323 Office of Nuclear Reactor Regulation ATTENTION:
Mr. T. A. Ippolito, Chief Operating Reactors Branch No. 3 United States Nuclear Regulatory Commission Washington, D. C.
20555 BRUNSWICK STEAM ELECTRIC PLANT, UNIT NOS. 1 AND 2 DOCKET NOS. 50-325 AND 50-324 LICENSE NOS. DPR-71 AND DPR-62 4UEST FOR LICENSE AMENDMENT - STANDBY GAS TREATMENT SYSTEM
Dear Mr. Ippolito:
In accordance with the Code of Federal Regulations, Title 10, Part 50.90 and Part 2.101, Carolina Power & Light Company hereby requests a revision to the Technical Specifications for its Brunswick Steam Electric Plant (BSEP) Unit Nos. 1 and 2.
These changes are to revise the surveillance requirement for the Standby Gas Treatment (SBGT) System heaters.
The existing Technical Specificatic is for BSEP Units 1 and 2 contain a surveillance requirement (4.6.6.1-d.3) to demonstrate that the SBGT System heaters will maintain an outlet 'emperature of 150*F i 10*F.
However, maintaining a certain outlet temperature is not the purpose of these heaters; their purpose is to reduce the relative humidity of the influent to the charcoal filters to less than 70 percent. Refer to the BSEP FSAR, Volume 2, Page 5.3-7, fourth paragraph.
Since BSEP cannot control the inlet temperature to the SBGT System, they also cannot control the outlet temperature at 150*F 10"F.
Due to this lack of control, some other means is necessary to verify that the heaters are performing their intended function of reducing relative humidity to less than 70 percent.
The Standard Technical Specifications for General Electric BWRs (GE STS) has a surveillance requirement (4.6.6.1-d.3) to verify humidity reduction capability by demonstrating that the heaters have sufficient heat dissipation capability. Also, the Hatch Unit 2 Standard Technical Specifications expresses this surveillance requirement in terms of heat dissipation capability.
The BSEP SBGT System heaters are designed to dissipate approxi-mately 18.8 kw at rated voltage.
If we make the following very conserva-tive assumptions for a heat balance on the BSEP SBGT System heaters, we 7 9 0 214 01 L9
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. arrive at the conclusion that the relative humidity of the influent to the charcoal filters will always be <70 percent. These conservative assumptions are:
1.
The voltage available to the SBGT System heaters is assumed to be the minimum of an allowable operating range of 480 volts AC 1 10 percent, i.e., 432 volts AC.
This yields a heat dissipation rate of 15.2 kw.
2.
The SBGT System is processing the design flow rate of 3000 SCn!
110 percent (i.e., 3300 SCn!) of air at the maximum heater design inlet temperature of 120'F and at 100 percent relative humidity.
Using these assumptions, the relative humidity of the influent to the charcoal filters is calculated to be approximately 68 percent.
The present 18-month surveillance interval for the BSEP Units 1 and 2 SBGT System heaters expires on February 12, 1979.
Since BSEP Unit 1 is presently in a refueling outage, this Technical Specifi-cation change for Unit 1 is not needed until near the end of its outage. However, in order to prevent shutting down Unit 2 and having to purchase replacement power, we request that the Staff consider 'his license amendment request for BSEP Unit 2 on an emergency basis prior to February 12.
The revised Technical Specification pages necessary to implement these changes are attached with the changes indicated by a vertical bar in the right-hand margin.
In accordance with 10CFR170.12(c), we have determined that this request constitutes one Class II amendment and one Class I amend-ment because it is an administrative revision to the format of a surveillance requirement to match GE STS.
Our check for $1,600 is enclosed as payment for these amendment fees.
Should you have any questions concerning this matter, please contact our staff.
'urs very,truly,
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- U?d DCS/ JAM /jc Senior Vice President Enclosures Power Supply Sworn to and subscribed before me this 6th day of February 1979.
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CCNTAI.*'ENT SYSTET'S 5 '!EILLANCE REDJIRD',ENTS (Continued) b.
At least once per 18 months or (1) af ter any,tructural mairi-tenance on the HEPA filter or charcoal adsorber housings, or (2) following painting, fire or chemical release in any venti-iation Zone communicating with the system by:
1.
Verifying that the cleanup system satisfies the in-place testing acceptance criteria anc uses the test procedures of Regulatory Positions C.S.a., c.5.c and C.5.d of Regula-tory Guide 1.52, Revision 1, July 1976, and the systen, flow rate is 3000 cfm 1 10 2.
Verifying within 31 days af ter removal that a laboratory analysis of a representative carbon samnle obtained in accordance with Regulatory Position C.6.b of Regulatory Guide 1.52. Re'.ision 1 July 1976, meets the laboratory testing criteria of Regulatory Position C.6.a of Regula-tory Guide 1.52, Revision 1, July 1976.
3.
Verifying a systen ficw rate of 3000 cfm + 10 during system operation when tested in accordance with ANS!
N510-1975.
Af ter every 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> of charcoal adsorber operation by c.
.erifying within 31 days af ter removal that a laboratory analysis of representative carbon sample obtained in accord-once with R:gulatory Position C.6.b of Regulatory Guide 1.53.
Revision 1, July 1976, meets the laboratory testing criteria of Regulatory Position C.6.a of Regulatory Guide 1.52, Revision 1, July 1976.
d.
Et least once per 15 rronths by:
1 Verifying that tne essure drop across the combined HEPA filters and charcoal adsorber banks is < 8.5 inches Water Gauge while operating the filter train at a flow rate of 3000 cfm + 102.
Verifying %at the filter train starts on each secondary c.
containme, isolation test signal.
l 3.
Verifying that the heaters will dissipate tc least 15.2 kw when tested in accordance with ANSI N510 1975.
BRUNSWICK - U"li 1 3/4 6-26
CONTAINMENT SYSTEMS SURVEILLANCE RE[J1REMENTS (C< ctinued) b.
At least once per 18 months or (1) after any structural main-tenance on the HEPA filter or charcoal adsorber housings, or (2) following painting, fire or chemical release in any venti-lation zone communicating with the system by:
1.
Verifying that the clecnup system satisfies the in-place testing acceptance criteria and uses the test procedures of Regulatory Positions C.5.a., C.5.c and C.5.d of Regula-tory Guide 1.52, Revision 1, July 1976, and the system flow rate is 3000 cfm 110'..
2.
Verifying within 31 days after removal that a laboratory analysis of a representative carbon sample obtained in accordance with Regulatory Position C.6.b of Regulatory Guide 1.52, Revision 1. July 1976, meets the laboratory testing criteria of Regulatory Position C.6.a of Regula-tory Guide 1.52, Revision 1, July 1976.
3.
Verifying a system flow rate of 3000 cfm i 10% during system operation when tested in occordance with ANSI N510-1975.
After every 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> of charcoal adsorber operation by c.
verifying within 31 days af ter removal that a laboratory analysis of representative carbon sample obtained in accord-ance with Regulatory Position C.6.b of Regulatory Guide 1.53, Revision 1, July 1976, meets the laboratory testing criteria of Regulatory Position C.6.a of Regulatory Guide 1.52, Revision 1, July 1976.
d.
At least once per 18 months by:
1.
Verifying that the pressure drop across the combined HEPA filters and charcoal adsorber banks is < 8.5 inches Water Gavae while operating the filter train at a flow rate of 3000 cfm i 10%.
2.
Verifying that the filter train starts on each secondary containment isolation test signal.
3.
Verifying that the heaters will dissipate at least 15.2 kw l
when tested in accordance with ANSI N510-1975.
BRUNSWICK - UNIT 2 3/4 6-26