ML20128G669
| ML20128G669 | |
| Person / Time | |
|---|---|
| Site: | Duane Arnold  |
| Issue date: | 10/03/1996 |
| From: | Kelly G NRC (Affiliation Not Assigned) |
| To: | |
| Shared Package | |
| ML20128G673 | List: |
| References | |
| NUDOCS 9610090096 | |
| Download: ML20128G669 (6) | |
Text
_
A ncog g*
t UNITED STATES I
j NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 3086H001 0
/
i l
IES UTILITIES INC.
CENTRAL IOWA POWER COOPERATIVE l
CORN BELT POWER COOPERATIVE DOCKET N0. 50-331 i
DUANE ARNOLD ENERGY CENTER AMENDMENT TO FACILITY OPERATING LICENS1 Amendment No. 218 License No. DPR-49 l
5.
The Nuclear Regulatory Commission (the Commission) has found that:
A.
The application for amendment by IES Utilities Inc., et al., dated i
July 5, 1996, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act), and the Commission's rules and regulations set forth in 10 CFR Chapter I; 8.
The facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations of the Commission; C.
There is reasonable assurance (1) that the activities authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conducted in compliance with the Commission's regulations; D.
The issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public; and E.
The issuance of this amendment is in accordance with 10 CFR Part 51 of the Commission's regulations and all applicable requirements have been satisfied.
2.
Accordingly, the license is amended by changes to the Technical Specifi-cations as indicated in the attachment to this license amendment and paragraph 2.C.(2) of Facility Operating License No. DPR-49 is hereby amended to read as follows:
9610090096 961003 PDR ADOCK 05000331 P
PDR l
4 (2) Technical Snecificatjgt 3
The Technical Specifications contained in Appendix A, as revised through Amendment No. 214 are hereby incorporated in the license.
1 The licensee shall operate the facility in accordance with the Technical Specifications.
3.
The license amendment is effective as of the date of issuance and shall be implemented within 30 days of the date of issuance.
FOR THE NUCLEAR REGULATORY COMISSION P
/
1 rJAALL f
Glenn B. l('lly, roje t Manager e
Project Directorate III-3 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation
Attachment:
Changes to the Technical Specifications Date of issuance:
October 3, 1996 O
ATTACHMENT TO LICENSE AMENDMENT NO. 218 FACILITY OPERATING LICENSE NO. DPR-49 DOCKET NO. 50-331 I
Replace the following pages of the Appendix A Technical Specifications with the enclo:ed pages. The revised areas are indicated by vertical lines.
i Remove Insert 3.6-4 3.6-4 3.6-6 3.6-6 3.6-21 3.6-21
^
l I
i
DAEC-1 LIMITING CONDITIONS FOR OPERATION SURVEILLANCE RE0VIREMENTS
- 2) With the conductivity exceeding c.
Obtain and analyze a sample of the 10.0 pmo/cm at 25'C or chloride reactor coolant for chlorides at concentration exceeding 500 ppb, least once every 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> whenever be in at least HOT SHUTDOWN either, the conductivity is within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in greater than the limit specified COLD SHUTDOWN within the in Table 3.6.b.2-1, or during following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
Noble Metal Chemical Addition.
- 3) Continuously record the d.
Obtain and analyze a sample of the conductivity of the reactor reactor coolant for pH at least coolant. With no continuous once every 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> whenever recording conductivity monitor either, the conductivity is I
OPERABLE, install a temporary in-greater than the limit specified line conductivity monitor within in Table 3.6.B.2-1, or during 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> or be in at least HOT Noble Metal Chemical Addition.
SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the e.
Vith no continuous recording following 24 hcurs.
conductivity monitor OPERABLE, obtain an in-line conductivity
- b. In STARTUP and HOT SHUTDOWN:
measurement at least once per 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> when in RUN, STARTUP, or H0T
- 1) With the conductivity, chloride SHUTDOWN MODES and 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> at all concentration or pH et.eeding the other times.
limit specified in Table 3.6.B.2-I for more than 48 continuous f.
Perform a CHANNEL CHECK of the hours, be in at least HOT continuous conductivity monitor at SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> least once per 7 days.
and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
c.
In COLD SHUTDOWN and REFUEL:
- 1) With the conductivity or pH exceeding the limit specified in i
Table 3.6.B.2-1, restore the conductivity and pH to within the limit within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
- 2) With chloride concentration exceeding the limit specified in Table 3.6.B.2-1, restore the chloride concentration to within
~ he limit within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
t AMENDMENT NO. EGB, 218 3.6-4
.m xM 5M
'i 5
t
<n Table 3.6.B-2-1 L
jS CHEMISTRY LIMITS j$
CONDUCTIVITY MODES CHLORIDES pMHOS/CM9 25'c PH RUN
__$_200_ ppb
_ s,1.0 5.6 S_PH < 8.6 STARTUP/ HOT SHUTDOWN 5 100 ppb
$ 2.0 **
5.6 $ PH $ 8.6 l
F COLD 5 100 ppb 5 5.0 4.6 $ PH e
a SHUTDOWN / REFUELING
- R' Not applicable with no fuel in the reactor vessel
- During Noble Metal Chemical Addition (NMCA), 10.0 pMHOS/CM is the limit
DAEC-1 dependent corrosion rates and provide time for the RWCU System to re-establish the purity of the reactor coolant. During some periods of operation, conductivity or chloride concentration may exceed 5.0 peo/cm or 200 ppb respectively because of the initial evolution of gases, the initial addition of dissolved metals, or the breaking out of chlorides entrapped in the system.
The total time during which the conductivity or chloride concentration may exceed the specified limit must be limited to 2 weeks / year or less to prevent stress corrosion cracking.
At DAEC, conductivity is continuously monitored at the Reactor Water Cleanup System, between the hot well and the domineralizer beds, and at the outlet of the demineralizer beds. Any of these monitors are considered to fulfill the requirement of continuously monitoring the Reactor Coolant System.
In the event that the conductivity cannot be continuously monitored, a temporary in-l line monitor is to be installed, The iodine radioactivity will be monitored by reactor unter sample analysis.
The total iodine activity would not be expected to change over a period of I week.
In addition, the trend of the offgas stack release rate, which is continuously monitored, is an indication of the trend of the iodine activity in the reactor coolant. Since the concentration of radioactivity in the reactor coolant is not continuously measured, coolant sampling would be ineffective as a means to rapidly detect gross fuel element failures.
however, the capability to detect gross fuel element failures is inherent in the radiation monitors in the Offgas System and on the main steam lines.
The conductivity of the reactor coolant is continuously monitored.
Conductivity instrumentation will be checked every 4 days by instream measurements with an independent conductivity monitor to assure accurate readings. If conductivity is within its normal range, chlorides and other impurities will also be within their normal ranges. The reactor coolant samples will also be used to determine the chlorides. Therefore, the sampling frequency is considered adequate to detect long-term danges in the chloride ion content. Isotopic analyses to determine ma9r contributors to activity can be performed by a gamma scan.
Noble Metal Chemical Addition (NMCA) has been developed by General Electric Nuclear Energy (GENE) as a method to enhance the effectiveness of Hydrogen Water Chemistry (HWC) in mitigating Intergranular Stress Corrosion Cracking (IGSCC) in Boiling Water Reactor (BWR) vessel internal components. Additionally, use of NMCA will allow lower injection rates of HWC which in turn reduces plant radiation exposure over the life of the plant. NMCA process will deposit a very thin, discontinuous layer of noble metals onto all wetted surfaces during the injection process. The treated surfaces will brave catalytically and promote oxidant-hydrogen recombination. This results in low corrosion potential of components at low hydrogen injection rates. Higher reactor water i
conductivity is anticipated during the application due to the effect of non-corrosive noble metals on the measured conductivity.
Amendment No. 71,203,218 3.6-21 i
)