Tenders Are Invited For Technical Testing, Analysis And Consultancy Services - Pavets Chaira - Expert Assess ... in Bulgaria

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Technical Testing, Analysis And Consultancy Services - Pavets Chaira - Expert Assessment And Risk Analysis, Ref. No. 26Ip-P19a114. Pavets Chaira Is The Largest Pumped-Storage Hydroelectric Plant In South-Eastern Europe And Plays An Essential Role In The Countrys Electricity System. Four Single-Stage Hydro Units (Xa) From 1 To 4 (Xa1, Xa2, Xa3 And Xa4) Are Installed In The Plant, Each With A Capacity Of 216 Mw In Generator Mode And 197 Mw In Pump Mode, Which Are Located In The Cavern In Two Hydrogroups Fed By Two Separate Pressure Shafts. The Subject Of The Public Procurement Includes The Preparation Of An Expert Assessment For The Removal Of Secondary Concrete Around Each Spiral Chamber, The Dismantling Of A Spiral Chamber And The Analysis Of The Static And Dynamic Scheme Of The Building Structures And Machine Equipment, Before And After The Removal Of The Secondary Concrete (Including The Spiral Chamber), As Well As An Assessment Of The Risk Of The Implementation Of The Activities. In The Expert Assessment, It Is Necessary To Include Method, Technology And Sequence Of Actions. The Minimum Activities Included In The Service Subject To The Order Are: - Detailed Familiarization With Archival Documentation; - Detailed Introduction To The Terrain; - Preparation Of A (3D) Three-Dimensional Spatial Model By Scanning And Photographing The Reinforced Concrete Structure Of The Plant And The Main Equipment; - Preparation Of A Three-Dimensional Numerical Model (Finite Element Method - Fem); - Analysis Of The Static Scheme Of The Construction Of The Secondary Concrete Around Each Spiral Chamber, Analysis Of The Static Scheme Of The Building Plant, Analysis Of Their Relationship And Their Mutual Influence; - Analysis Of The Impact Of Removing The Secondary Concrete Around Each Spiral Chamber On The Supporting Structure Of The Central Building And The Cavern; - Analysis Of The Possibility Of Operation Of One Hydro Unit From A Hydro Group, During Dismantling Of Secondary Concrete And Spiral Chamber Of The Other Hydro Unit From The Same Group; - Analysis Of The Possibility Of Repairing A Hydrounit/S From A Hydrogroup, When Dismantling Secondary Concrete And A Spiral Chamber Of Another Hydrounit/S From The Other Hydrogroup, As Well As Compatible And Incompatible Combinations For The Repair Of Individual Hydrounits; - Assessment Of The Risk Of The Implementation Of The Activities; - Preparation Of A Report With An Expert Assessment For Ha 4; - Preparation Of A Comprehensive Report With Expert Assessment For All Has. All Conditions Regarding The Scope And Manner Of Execution Of The Order Are Described In The Technical Specification.

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