ML110250260
| ML110250260 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 01/20/2011 |
| From: | Flores R, Mireles K Luminant Power |
| To: | Ludwig M Office of Nuclear Reactor Regulation, State of TX, Commission on Environmental Quality |
| References | |
| 418761, PWS 2130016, TXX#11009 | |
| Download: ML110250260 (16) | |
Text
Rafael Flores Luminant Power Senior Executive Vice President P 0 Box 1002
& Chief Nuclear Officer 6322 North FM 56 rafael.flores@ Luminant.com Glen Rose, TX 76043 T 254 897 5550 C 817 559 0403 F 254 897 6652 January 20, 2011 CERTIFIED MAIL: 7010 1870 0001 0617 5224 TXX#11009 Texas Commission on Environmental Quality Region 4 2309 Gravel Drive Fort Worth, Texas 76118-6951 Attn:
Ms. Merissa Ludwig Environmental Investigator Comanche Peak Nuclear Power Plant PWS #2130016 Comprehensive Compliance Investigation Findings Response Track #418761
Dear Ms. Ludwig:
This letter and attachment are provided in response to the letter of 13 December 2010 addressing the alleged violation noted at the above referenced Public Water System. The documentation for the interior surface inspection of the system's two pressure tanks are in accordance with 30 TAC 290.46(m)(1)(B).
The Company trusts that the submission of this documentation completes the required actions and resolves the alleged violation noted in the investigation summary. If you require additional information, please contact Mr. David Rutledge at 214-875-8296 or by e-mail david.rutledge@luminant.com.
Sincerely, Rafael Flores DER/attachment A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Kl PL Callaway
- Comanche Peak
- Diablo Canyon
- Palo Verde
- San Onofre
- South Texas Project - Wolf Creek
Texas Commission on Environmental Quality Trxx-1009 Page 2 01/18/2011 xc:
US Nuclear Regulatory Commission Document Control Desk 11555 Rockville Pike Rockville, MD 20852
LUMINANT COMANCHE PEAK NPP PWS #2130016 PRESSURE TANK INTERIOR SURFACE INSPECTION The interior surfaces of the two pressure tanks utilized in the PWS must be inspected at a minimum of 1/5 years in accordance with 30 TAC 290.46(m)(1)(B) in addition to the routine required 1/year inspection of the tank's operation, exterior coatings, and operational appurtenances.
30 TAC 290.46(m)(1)(B):
Pressure tank inspections must determine that the pressure release device and pressure gauge are working properly, the air-water ratio is being maintained at the proper level, the exterior coatings systems are continuing to provide adequate protection to all metal surfaces, and the tank remains in watertight condition. Pressure tanks provided with an inspection port must have the interior surface inspected every five years.
Inspections were performed:
Plant ("High Tank") Pressure Tank 12/20/2010 NOSF Pressure Tank 01/09/2011
LUMINANT COMANCHE PEAK NPP PWS #2130016 PRESSURE TANK INTERIOR SURFACE INSPECTION PLANT ("HIGH TANK") PRESSURE TANK Inspection Date:
12/20/2010, -15:00 hours Generally the interior coating of the tank was in good shape, with only minor corrosion noted, and nothing that appeared to compromise the integrity of the tank. The man way hatch and gasket were also in good shape. A thin layer of loose silt was noticed on a portion of the bottom of the tank near the tank drain. The small amount of accumulated sediment is indicative of source water iron which is precipitated through oxidation by chlorination. The areas of minor corrosion are noted in the photographs. The following are pictures of the interior of the tank.
This is the inside of the man way cover
f t 3/4j~
ilms pnoto snows tne gasket anai me man way opening
inls is iooxing in the man way to me opposite siae or the tanK. Notice tnle tine layer or material that defines the typical operating water level.
1 is is me view oi me intenor oi me tanK iooKing to me ieie irom me man way.
-inis is me penetration at me top ot the tanx, where tue air pressure is introcucea to tue tank.
i nls is me Dottom arain on me tanr, witn some resiauai sin.
This is the view looking straight down to the bottom of the tank from the man way.
lnis is tme view to me ngnt ot tne man way, snowing tue normal inietioutiet to tme tanK, and the penetration for the level detection system.
Inspection performed by:
Gordon Dalby Signature:
Date:
LUMINANT COMANCHE PEAK NPP PWS #2130016 PRESSURE TANK INTERIOR SURFACE INSPECTION NOSF PRESSURE TANK Inspection Date:
01/09/2011, -09:00 hours Generally the interior coating of the tank was in fair shape, with areas of general corrosion noted, but nothing that appeared to compromise the integrity of the tank. The man way hatch was also in good shape. The gasket was replaced. A thin layer of corrosion products was noticed on the portion of the tank above the water line. The bottom of the tank was clean and free of silt. The following are pictures of the interior of the tank.
i ne access man way to the tanK.
The interior of the tank looking up from the manway. The penetrations are for the nitrogen feed line (bottom of the picture), and the tank pressure relief valve (center of the picture.
Looking up and nignt ot tde man way is me worst area o0 interior liner aegracation in tne tank. Notice the slight bubbling in the coating. (upper center of the picture)
i ne oottom oi me tamK ana me tanK ieea/araln line.
t~ooKing across from mne man way. ine upper ana iower water ievei sensors ior nitrogen control. The other penetration visible is the lower vent line.
Inspection performed by:
Gordon Dalbv Signature:
Date:
Signature:
Date: