The Aperlena Verdict
Open raceNo supplier dominates: 6 different companies have won the last 8 comparable contracts from this buyer over 5 years. This is a genuinely open race.
Based on 8 comparable awards by this buyer in this sector over 5 years. Every verdict is recorded before the outcome and graded against the award notice. How we score ourselves.
Summary
Machine-generated summaryThe contract covers the modernisation of the existing relay protections of diesel generators (DG) 42 and 43, located at diesel generator station 2 (DGS-2). The works include dismantling and installation activities, with equipment, materials, consumables and products included, in accordance with a working design titled 'Modernisation of the electrical protections of DG42 and DG43'. The activities will be carried out within a protected zone on the site of the Kozloduy Nuclear Power Plant, which has an organised access control system including main gates of units 1 to 4. The scope, volume and performance requirements are described in detail in Technical Assignment No. 26.AEC.TZ.767, a technical specification for spare parts supply and quantitative and value statements, integral parts of the notice.
Description
Bid or no-bid?
Six questions before you commit a team. Under each one, what the register holds on it. The answers are yours.
Can I bid?
- Open procedure: any interested supplier may submit a bid.
- The notice is written in Bulgarian.
- Certificates from another EU country? Check the equivalents on eCertis
Official source
Source: CAIS EOP - Bulgarian national e-procurement (Public Procurement Agency)
Always verify details on the official notice.
Report an error in this notice
Last verified against CAIS EOP - Bulgarian national e-procurement (Public Procurement Agency) 39 minutes ago
Expected award price
- likely award for this notice, from its published estimate of €48,000
- €46,080 to €48,000
Comparable awards in this country and sector came in at a median of 99% of their published estimate, half of them between 96% and 100%, based on 531 awards of the last 3 years.
Each award is compared with the estimate of the same lots, framework agreements excluded. A published estimate may include options and renewals, so an award under it is not always a discount.
What this buyer has paid before
Based on 8 comparable contracts this buyer awarded in this sector over the last 4 years.
- This notice
- €48,000
- Median award
- €784,042
- Middle half of past awards
- €411,655 to €1.9M
The estimate is smaller than three in four past awards.
Most recent awards
- Construction of a new reinforced concrete slab in Warehouse No. 106 - petroleum products site €109,227
- Repair of the roof waterproofing of the SF Storage building at level +18.60, level +15.90 and level +21.60, by laying roll bitumen membrane using the gas-flame method €131,618
- България - Топлоизолационни строителни работи - Изпълнение на топлоизолационни работи и подготовка на метални повърхности за металоконтрол по съдове и тръбопроводи от основно и спомагателно оборудване от І-ви контур и тръбопроводи по грееща среда на 5, 6 блок, ДГС и Спецкорпус-3 през 2026 г. €1,578,151
- България - Строителни и монтажни работи на тръбопроводни инсталации - Захранване с топлинна енергия на сгради, находящи се на площадка АЕЦ „Козлодуй”, собственост на фирма „Атоменергоремонт” ЕАД €864,036
- България - Работи по демонтаж и подмяна на преносни и разпределителни тръбопроводи - Изместване на тръбопроводи техническа вода гр. А на II и III система на 4 бл. извън Машинна зала €704,049
Award values as published by the official sources. Use them as a guide, not a rule: scope, lots and duration differ between contracts.
The buyer
Full buyer profileАЕЦ КОЗЛОДУЙ ЕАД
- notices in the register
- 357
- awards
- 167
- awarded in total
- €443.7M
Who wins its contracts
Many suppliers- different companies won its awards
- 100
- of the awards went to the three most frequent winners
- 11%
- of its calls state an estimated value
- 100%
Based on 137 awards with a named winner over the last 3 years. Counted by award, not by value, because lot and framework amounts are not comparable. Concentrated means the three most frequent winners took 65% or more of the awards; many suppliers, under 35% with at least ten different winners.
Competition
- tenders per lot on average (open and restricted procedures)
- 2.3
- of those lots received a single tender
- 37%
- of the awards went to companies based in another country
- 6%
As the official award notices state them, over the last 3 years. Tenders per lot count open and restricted procedures only: in a negotiated procedure or a direct award a single tender is the procedure itself. The country is the one the notice gives for the winner.
One dot per award, on the day it was signed, sized by its value. A ring is an award with no published value.
Who usually wins this buyer's contracts in this sector
| Company | Wins | Total awarded | Last win |
|---|---|---|---|
| АТОМЕНЕРГОРЕМОНТ АД | 2 | €5.7M | Nov 2025 |
| ЕНЕРГОМОНТАЖ - МК ЕООД | 2 | €614,228 | Sep 2026 |
| ДЗЗД ЕММК 25 | 1 | €2.7M | Sep 2025 |
| СТАЙКОВА-БОРИСОВ ИЗОПЕЩ ООД | 1 | €1.6M | Apr 2026 |
| МОНТАЖИ КО ЕООД | 1 | €704,049 | Oct 2025 |
Based on 8 awards with a linked company profile over the last 5 years.
39 open tenders right now
Market context
Larger than 8% of the open notices in Construction work across Europe.
- open now in Construction work
- 20,923
- median open notice
- €559,747
Who wins in this market
Many suppliersBulgaria · Construction work
- different companies won awards here
- 1,031
- of the awards went to the three most frequent winners
- 4%
- buyers awarded contracts here
- 405
Based on 2,410 awards with a named winner over the last 3 years. Counted by award, not by value, because lot and framework amounts are not comparable. Concentrated means the three most frequent winners took 65% or more of the awards; many suppliers, under 35% with at least ten different winners.
Competition
- tenders per lot on average (open and restricted procedures)
- 2.7
- of those lots received a single tender
- 32%
- of the awards went to companies based in another country
- 1%
- of the tenders came from another country
- 1%
As the official award notices state them, over the last 3 years. Tenders per lot count open and restricted procedures only: in a negotiated procedure or a direct award a single tender is the procedure itself. The country is the one the notice gives for the winner.
Similar tenders
Open now
2
days left
€131,700
est. value
Awarded before
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