ML19344A304
| ML19344A304 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 01/22/1971 |
| From: | Gower G, Oller R, Vetter W US ATOMIC ENERGY COMMISSION (AEC) |
| To: | |
| Shared Package | |
| ML19344A302 | List: |
| References | |
| 50-329-71-01, 50-329-71-1, 50-330-71-01, 50-330-71-1, NUDOCS 8008070680 | |
| Download: ML19344A304 (9) | |
Text
{{#Wiki_filter:._. G ~ 1 . Qj m f e 3 f U.~S. ATOMIC ENERGY COMMISSION DIVISION OF COMPLIANCE REGION III ' Report of Construction Inspection. CO Report No. 329/71-1 C0 Report No. 330/71-1 Licensee: Consumers Power Company (Midland Units 1 & 2) CPPR not yet issued Category A 4 Date of Inspection: January 7, 1971 Dates of Previous Inspection: September 29 and 30 and October 1, 1970 Ge O) Inspected By: G. C er Reactor-Inspector 1-21-71 i 0E lw ~R. E ller Metallurgical Engineer 1-21-71 0$ Reviewed By: W. E.67etter Sr. Reactor Inspector 1-22-71 l P roprie tary -Information: None i 1 SCOPE l Type of Facility: Pressurized Water Reactor Power Level: 3363 (Mwt), 662 (Mwe) each unit -Location: Midland, Michigan Type of Inspection: Special, announced ~ Accompanying Personnels .None
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[ - Scope of Inspection: The purpose of this special' inspection was to review the measures taken to protect materials, A
- t equipment, and. foundation structures during a temporary construction shutdown ' period. ~Ai review of = the security measures for the general construction area =was also made.; : The status' of several follow-up items was discussed. -
SUMMARY
Safety Items - None. Noncompliance Items - None. Unusual Occurrences None. Status ' of Previously Reported Problems - Previous ' Inspection Report Nos. 329/330/70-6' listed four' items'of nonconformance. The following information regarding'these items was obtained during this inspection. ()
- 1. ;According to Messrs.'N. Paige and B. Peck, corrective action bylthe applicant -to improve the use of vibrators has been taken.
Bechtel established a special crew of craf t personnel-to do the vibrator work. This: crew has been trained'in the proper. . use of ' vibrators. 2. Regarding the taking of aggregate gradation and organic tests: in accordance with the PSAR,-Mr. Peck said that Consumers Power - has reviewed the. frequency of' aggregate testing and, where necessary, more frequent tests will be made to comply'with the PS AR. :
- 3..Mr. Peck stated.that they have been taking concrete samples for. slump -in accordance with ASTM-C-172-54 (Revised 1958) which l requires only aj single sample ~of concrete from stationary mixers.
- ASTM-C-172-68,l which is ja lacer ' edition,' requiresisarples at -
two' intervals during discharge of' the middle portion 'of the ' b at ch. ' This idifference' in requirements -has been brought to the' attention ofitheLapplicant by telephone and will receive follow-up, attention et thel time - concrete - work ' resumes.
- 4.. Regarding 'theLlack of; prompt attention on the part. of QC inspection staff L to identify-and correct apparent deviations, the applicant,
[(according. to ' Peck)' has requested that Bechtel upgrade the QC ~ O u ~ (* k - a
-[} %~ l: . inspection force in the area of concrete placement. In this regard, Peck reported that Bechtel and Consumers Power (CP) have conducted reviews.of the ACI-301 standard. Additionally, special inspector training sessions have been conducted for the site inspection force and Bechtel has assigned a full-time engineer to inspect all Q-list pours. s-l The' results of the UT testing perforr.< ; on the auxiliary building base slab by Letcher Associates wew, also reviewed during the current inspection. TVo reports were res ewed which described the testing methods used and the results. The reports indicated that the structure was sound and free of significant voids. (II-C) Other Significant Items - None. 1 Management Interview ' } Persons in attendance: %s N. Paige - Project Superintendent C. Hills - QA Engineer (Jackson, Michigan office) B. Peck - Field QA' Engineer j: F. Plutchak - QA Engineer, Bechtel Corporation The inspectors summarized the inspection findings and said that the ar.tions taken to protect materials, equipment, and structures app.ared to be adequate. The applicant was also told that the audit program to assure implementation of the protective measures appeared to be' adequate. The Lapplicant was questioned to determine if advance planning was in progress 'to establish the actions to be taken to restore the site to full' construction status when required. -Mr. Paige said { that the plannie, in this area will depend to a large extent on ~ . the. length of shutdown. However, he said that the planning to cover resumption of construction would be Bechtel's responsibility and he anticipated that it would include adequate steps to verify the integrity of. the existing structures, etc., before rest: ming construction. The applicant was urged to.give consideration to this aspei..t of the facility shutdown status. .-['~~ x; 4
i (k s/ , f - The applicant was informed that the information obtained regarding - the status of previously reported problems was beneficial; how ; r, since construction work had been terminated for the shutdown period, it appeared that these items 'should remain in the. follow-up status until work resumes and further inspection efforts indicate they have been resolved. Subsequent to the inspaccion, on January. 18, 1971, the applicant was i informed by telephone that CO had completed a review of the four items listed under the " Status of Previously Reported Problems," section of this report-and would issue a CDN on ~ Items 1 and 2. .The-applicant was also informed that all four items would receive follow-up attention during future inspections. D,ETAILS j I. Persons Contacted Same as listed above for Management Interview. ,o - II. Resul.ts of Inspection ~ A. Applicant's Planning for Shutdown Period Consumers Power Company (CP) has prepared a " Shutdown and Protection Plan"- for the Midland site. Preparation and implementation of. this plan was accomplished with assistance from the Bechtel Corporation Engineering Section in San Francisco. This plan was organized in three specific areas as follows: -1. ' Site Storage and Material Summary. .2. Preservation of Plant Foundation Structure. 3. Site. Surveillance During the Shutdown Period. i Since the implementation of -the ' plan, Bechtel engineers have~. inspected the site. - According' to CP,-- Bechtel will continue - to provide engineering assistance as required. The next Bechtel site : inspection is slated for early spring...when thawing is anticipated. l Cf 1 r 6 + y-v.- - - -c.v, .,.--e, -.e. g --e9,
+ '%~,) f 5-t B. Compliance Observations k 1. Storage of. Materials, Equipment, and Supplies ? 'The storage condition and location of all materials, p.~ equipment, and supplies were described in the shutdown plan. The. inspectors - performed a-visual inspection of selected items and determined that conditions were in accordance with the plan. It was noted that valves . and rotating equipment, such as electric motors or i= pumps for installation in the. plant, had not been chipped to the site prior to shutdown and, consequently, .the need for special treatment of this equipment was est required. i The selected items and their ' storage condition were as follows: a.. Stainless' Steel Pipe 3 - ' The 4" diameter stainless steel piping assemblies for the radwaste system were observed to be stored a on wooden supports in a weatherproof building. All:the pipe ends were adequately capped.for protection. b. Carbon Steel Piping The large diameter main condenser cooling water pipe was observed to be stored in the open, on dunnage, at the Dow Chemical. Company (Dow) railroad siding._ No special storage requirements were identified in,the plan for this pipe. c. Containment Liner Plate The major port'on of the pref abricated sections i of containment liner plate were observed to be stacked vertically.in the' open on dunnage at the p Dow railroad siding. These sections had been painted by.the manufacturer to retard rusting. ~ Weld lend preparations were not painted and will-require cleaning when used. O q e- -e 4 w +--- - 4 "*e+ -re e "' t e &iem e-w r et y wt v-t &W fwie - e
] T /. s ,. i _ d. Containment Penetrations The carbon steel, capped and painted, containment penetrations were individually stored on dunnage at the Dow siding. e.- Cadwelding Equipment and Materials 10te inspectors observed that the Cadwelding molds, related equipment, and splices were stored in j a weatherproof building. _ CP representatives stated that the Cadwelfing powder had been returned to the vendor. f. Electrical Materials and Equipment-The inspectors observed that electrical conduit, f-g elbows, and other equipment were stored in an () 2nclosed area of the field office building. Construction transformers were found to have been covered and - stored in a weatherproof building. The inspectors were told that the plastic ABS-Type conduit was covered with a -tarpaulin and stored outdoors on dunnage.. g. Welding Rod - By observation, it was determined that sealed containers of-welding electrodes were stored in l .an area of the field office. 'According to CP, I all partially used; containers and all loose welding - electrodes had been removed from the site, in accordance with the shutdown plan. 2.- Preservation of Plant Foundation Structures ' According-to CP, the major concern with protecting i
- the foundation structures centered around the prevention j
of extensive. subsoil freezing and thawing beneath -the~sttuctures, since this condition could produce
- upheaval'and damage to the existing structures. In general, the protective measures consisted of~ covering 77-4 Jthe. structures with insulating. type materials and i
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)- monitoringLthe temperatures. At the. time of the %? inspection, the temperature history. indicated that there I would not be a problem in this ' area. e
o j-sq. \\,l ( 1 Following are the observations made by the inspectors: ~ la. Reactor Building - Unit'No. 1 It was observed that the reactor building foundation had been covered with about three feet of straw. The' entire structure and straw had been enclosed . with a wood frame and covered with plywood. The plywood was sealed with tar paper and tar. A clock type temperature recorder;had been installed to record the temperature of the upper nurface of the concrete slab. This recorder is ' read each shif t by the security guard. Provisions were made to monitor for water col-lection at the low point of the. structure and suction pumps were placed in these locations in the event that they are needed. Provisions for
- /~'s fire protection have been made. -Water supply-(,)
lines have been heat traced and insulated, b. Reactor Building - Unit No. 2 The Unit No. 2 foundation had not progressed as far as Unit.No.1. prior to shutdoun and different protection measures were-effected. The reactor building foundation was covered with a minimum -of three feet of sand. Sheet plastic was placed over the sand. The tendon gallery roof was covered with mesh -wire, straw and sheet plastic. A temperature recorder was installed to monitor the interface temperature between the concrete and sand. This recorder is also to be read each shif t. c. Turbine Building Protection relative to this structure was noted to be essentially the same as described in Item a, above,Jfor. the Unit No.1 reactor building. .. jN L !( l' p pc r f --e er e - m-*
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- d.. Auxiliary Building This structure was noted to have been covered with three feet of straw;
~<ever, the straw has been protected from wind, c., by having been covered with sheet plastic Instead of plywood. It was explained, by Mr. Paige, that chances of serious freezing and upheaval ~ were less likely in the case of this structure because the concrete slab was about six feet thick. Provisions for water removal consisted of the installation of an automatic-float actuated sump pump. This pump has been centrally located in a sump capable of receiving water from several locations. A-concrete temperature detector.and recorder has been provided. 3. Site Surveillance During Shutdown 7-I \\s / CP has prepared and implemented a " Site Shutdown Surveillance Procedure." This-document included' guidelines for conducting site surveillance during' the shutdown period. Additionally, a general field audit form had been modified for use in documenting the surveillance activities. Au lits.are scheduled to be performed by the CP QA Engineer on a weekly basis. Copies of completed aucit forms were reviewed by the inspectors and found - to be adequate for the intended purpose. It was noted that the audit forms are reviewed by the CP Midland . Project Superintendent. ~Significant audit points were observed to be as follows: a. Four storage creas, i.e., - the - Dow railroad siding, the county farm area, the plant outside area, and the concrete batch plant and testing laboratory. b. Field office building - records and document 3 storage, valuable tools and materials. c. Plant foundation structures - temperature detection and recording instruments, sump pump operation, -[, T fire hazards, fire protection equipment, water
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drainage and general integrity of coverings.
b d 9 ,4 j-~. -s../ 4 - 4' ._9_ f-1 d. Site security system - completeness of audits by 24-hour security guard service and adherence to. established procedures. 4 4. Batch Plant' and Testing Laboratorv i - Shutdown and protection of the concrete batch plant i - was determined to be the responsibility of Champion, Inc. : According to Mr. _ Paige,: CP may purchase the batch plant. fIf this occurs, CP will expand their shutdown plan to take over the surveillance of the j concrete batch plant. The W. H. Flood Testing Laboratory was-inspected during the visit. It -was noted that 83 concrete ) cylinders were still in the. curing process. Curing i 4 temperatures were being maintained and recorded on 4 a:shif t basis by the security guards. The last of the concrete cylinders are scheduled to be broken by Flood personnel on February 15, 1971. x-I C. Followup on Previous Inspection Findings 1 In addition to the four items -included above, under " Status i of Previously Reported. Problems," followup was made on the results-i of ultusonic-tests (UT) made on the auxiliary build *aig base slab. 4 During this inspection, two ; reports prepared by Letcher Associates I were reviewed by the inspectors.. These reports described the UT-tests performed on the auxiliary building base slab,1/ methods used, and the results obtained. The reports indicated that the base slab was-a sound structure and free of significant voids. l This item' is' being removed from our list of follow-up items. [. 4. 1 k-i .. D 1/ Refer.to CO Report No. 329/70-6, pg. 3, Management Interview, Item 1. / A_) 4 i v - 4 m w m ~ ~ e-, - - v --en w w e w s w-+ - r =}}